diff --git a/src/main/java/de/thm/arsnova/cache/CacheBuster.java b/src/main/java/de/thm/arsnova/cache/CacheBuster.java
index 5d1b1ccc2d82c57d5b1c2150c7804e195072a2e5..06c3830507a9e90739d7cf22a75d7607576033a7 100644
--- a/src/main/java/de/thm/arsnova/cache/CacheBuster.java
+++ b/src/main/java/de/thm/arsnova/cache/CacheBuster.java
@@ -30,98 +30,98 @@ public class CacheBuster implements ICacheBuster, NovaEventVisitor {
 
 	@CacheEvict(value = "statistics", allEntries = true)
 	@Override
-	public void visit(NewInterposedQuestionEvent event) {}
+	public void visit(NewInterposedQuestionEvent event) { }
 
 	@CacheEvict(value = "statistics", allEntries = true)
 	@Override
-	public void visit(DeleteInterposedQuestionEvent event) {}
+	public void visit(DeleteInterposedQuestionEvent event) { }
 
 	@Override
-	public void visit(NewQuestionEvent event) {}
+	public void visit(NewQuestionEvent event) { }
 
 	@Override
-	public void visit(UnlockQuestionEvent event) {}
+	public void visit(UnlockQuestionEvent event) { }
 
 	@Override
-	public void visit(UnlockQuestionsEvent newQuestionsEvent) {}
+	public void visit(UnlockQuestionsEvent newQuestionsEvent) { }
 
 	@Override
-	public void visit(LockQuestionEvent lockQuestionEvent) {}
+	public void visit(LockQuestionEvent lockQuestionEvent) { }
 
 	@Override
-	public void visit(LockQuestionsEvent lockQuestionsEvent) {}
+	public void visit(LockQuestionsEvent lockQuestionsEvent) { }
 
 	@CacheEvict(value = "answers", key = "#event.Question")
 	@Override
-	public void visit(NewAnswerEvent event) {}
+	public void visit(NewAnswerEvent event) { }
 
 	@Override
-	public void visit(DeleteAnswerEvent event) {}
+	public void visit(DeleteAnswerEvent event) { }
 
 	@Override
-	public void visit(DeleteQuestionEvent event) {}
+	public void visit(DeleteQuestionEvent event) { }
 
 	@Override
-	public void visit(DeleteAllQuestionsEvent event) {}
+	public void visit(DeleteAllQuestionsEvent event) { }
 
 	@Override
-	public void visit(DeleteAllQuestionsAnswersEvent event) {}
+	public void visit(DeleteAllQuestionsAnswersEvent event) { }
 
 	@Override
-	public void visit(DeleteAllPreparationAnswersEvent event) {}
+	public void visit(DeleteAllPreparationAnswersEvent event) { }
 
 	@Override
-	public void visit(DeleteAllLectureAnswersEvent event) {}
+	public void visit(DeleteAllLectureAnswersEvent event) { }
 
 	@Override
-	public void visit(NewFeedbackEvent event) {}
+	public void visit(NewFeedbackEvent event) { }
 
 	@Override
-	public void visit(DeleteFeedbackForSessionsEvent event) {}
+	public void visit(DeleteFeedbackForSessionsEvent event) { }
 
 	@Override
-	public void visit(StatusSessionEvent event) {}
+	public void visit(StatusSessionEvent event) { }
 
 	@CacheEvict(value = "statistics", allEntries = true)
 	@Override
-	public void visit(ChangeLearningProgressEvent changeLearningProgress) {}
+	public void visit(ChangeLearningProgressEvent changeLearningProgress) { }
 
 	@Override
-	public void visit(PiRoundDelayedStartEvent piRoundDelayedStartEvent) {}
+	public void visit(PiRoundDelayedStartEvent piRoundDelayedStartEvent) { }
 
 	@Override
-	public void visit(PiRoundEndEvent piRoundEndEvent) {}
+	public void visit(PiRoundEndEvent piRoundEndEvent) { }
 
 	@Override
-	public void visit(PiRoundCancelEvent piRoundCancelEvent) {}
+	public void visit(PiRoundCancelEvent piRoundCancelEvent) { }
 
 	@Override
-	public void visit(PiRoundResetEvent piRoundResetEvent) {}
+	public void visit(PiRoundResetEvent piRoundResetEvent) { }
 
 	@CacheEvict(value = "statistics", allEntries = true)
 	@Override
-	public void visit(NewSessionEvent newSessionEvent) {}
+	public void visit(NewSessionEvent newSessionEvent) { }
 
 	@CacheEvict(value = "statistics", allEntries = true)
 	@Override
-	public void visit(DeleteSessionEvent deleteSessionEvent) {}
+	public void visit(DeleteSessionEvent deleteSessionEvent) { }
 
 	@Override
-	public void visit(LockVoteEvent lockVoteEvent) {}
+	public void visit(LockVoteEvent lockVoteEvent) { }
 
 	@Override
-	public void visit(LockVotesEvent lockVotesEvent) {}
+	public void visit(LockVotesEvent lockVotesEvent) { }
 
 	@Override
-	public void visit(UnlockVoteEvent unlockVoteEvent) {}
+	public void visit(UnlockVoteEvent unlockVoteEvent) { }
 
 	@Override
-	public void visit(UnlockVotesEvent unlockVotesEvent) {}
+	public void visit(UnlockVotesEvent unlockVotesEvent) { }
 
 	@Override
-	public void visit(FeatureChangeEvent featureChangeEvent) {}
+	public void visit(FeatureChangeEvent featureChangeEvent) { }
 
 	@Override
-	public void visit(LockFeedbackEvent lockFeedbackEvent) {}
+	public void visit(LockFeedbackEvent lockFeedbackEvent) { }
 
 }
diff --git a/src/main/java/de/thm/arsnova/cache/ICacheBuster.java b/src/main/java/de/thm/arsnova/cache/ICacheBuster.java
index 9800991cf30979af2abaad4b316b6d8c471f4e64..a428fc71f0d19e188c190be8448d4e1e5715c332 100644
--- a/src/main/java/de/thm/arsnova/cache/ICacheBuster.java
+++ b/src/main/java/de/thm/arsnova/cache/ICacheBuster.java
@@ -20,4 +20,4 @@ package de.thm.arsnova.cache;
 /**
  * This interface is used as a tag to make Spring dependency injection happy...
  */
-public interface ICacheBuster {}
+public interface ICacheBuster { }
diff --git a/src/main/java/de/thm/arsnova/cache/package-info.java b/src/main/java/de/thm/arsnova/cache/package-info.java
index 4bf0879279bedfe80f9c547d1c86450b33ee725d..af908a396bda1ac1f08f93f39de9cf83cd558f79 100644
--- a/src/main/java/de/thm/arsnova/cache/package-info.java
+++ b/src/main/java/de/thm/arsnova/cache/package-info.java
@@ -1,4 +1,4 @@
 /**
  * Classes and interfaces related to caching
  */
-package de.thm.arsnova.cache;
\ No newline at end of file
+package de.thm.arsnova.cache;
diff --git a/src/main/java/de/thm/arsnova/controller/AudienceQuestionController.java b/src/main/java/de/thm/arsnova/controller/AudienceQuestionController.java
index 49472664ee824fe1c57065592efb09725d584118..6a9f611f6f9ae003e8b46b4c8b19265d112be7aa 100644
--- a/src/main/java/de/thm/arsnova/controller/AudienceQuestionController.java
+++ b/src/main/java/de/thm/arsnova/controller/AudienceQuestionController.java
@@ -60,7 +60,7 @@ public class AudienceQuestionController extends PaginationController {
 	@RequestMapping(value = "/count", method = RequestMethod.GET)
 	@DeprecatedApi
 	@Deprecated
-	public int getInterposedCount(@ApiParam(value="Session-Key from current session", required=true) @RequestParam final String sessionkey) {
+	public int getInterposedCount(@ApiParam(value = "Session-Key from current session", required = true) @RequestParam final String sessionkey) {
 		return questionService.getInterposedCount(sessionkey);
 	}
 
@@ -96,8 +96,8 @@ public class AudienceQuestionController extends PaginationController {
 	@RequestMapping(value = "/", method = RequestMethod.POST)
 	@ResponseStatus(HttpStatus.CREATED)
 	public void postInterposedQuestion(
-			@ApiParam(value="Session-Key from current session", required=true) @RequestParam final String sessionkey,
-			@ApiParam(value="the body from the new question", required=true) @RequestBody final de.thm.arsnova.entities.InterposedQuestion question
+			@ApiParam(value = "Session-Key from current session", required = true) @RequestParam final String sessionkey,
+			@ApiParam(value = "the body from the new question", required = true) @RequestBody final de.thm.arsnova.entities.InterposedQuestion question
 			) {
 		if (questionService.saveQuestion(question)) {
 			return;
@@ -109,7 +109,7 @@ public class AudienceQuestionController extends PaginationController {
 	@ApiOperation(value = "Deletes an InterposedQuestion",
 			nickname = "deleteInterposedQuestion")
 	@RequestMapping(value = "/{questionId}", method = RequestMethod.DELETE)
-	public void deleteInterposedQuestion(@ApiParam(value = "ID of the question that needs to be deleted", required=true) @PathVariable final String questionId) {
+	public void deleteInterposedQuestion(@ApiParam(value = "ID of the question that needs to be deleted", required = true) @PathVariable final String questionId) {
 		questionService.deleteInterposedQuestion(questionId);
 	}
 }
diff --git a/src/main/java/de/thm/arsnova/controller/CourseController.java b/src/main/java/de/thm/arsnova/controller/CourseController.java
index f27d177974c9a2fd983a290c314e9a8c2a5e0221..3c7847a8e6363a4b7a1c243f98c34cbf291df964 100644
--- a/src/main/java/de/thm/arsnova/controller/CourseController.java
+++ b/src/main/java/de/thm/arsnova/controller/CourseController.java
@@ -55,7 +55,7 @@ public class CourseController extends AbstractController {
 
 	@RequestMapping(value = "/mycourses", method = RequestMethod.GET)
 	public List<Course> myCourses(
-			@ApiParam(value="sort my courses by name", required=true)
+			@ApiParam(value = "sort my courses by name", required = true)
 			@RequestParam(value = "sortby", defaultValue = "name") final String sortby
 			) {
 
diff --git a/src/main/java/de/thm/arsnova/controller/LecturerQuestionController.java b/src/main/java/de/thm/arsnova/controller/LecturerQuestionController.java
index 945565766ca82a7482e763eb686834108d31bdad..6abc659169dfad60fb2b6d7a6e966043b4c8609d 100644
--- a/src/main/java/de/thm/arsnova/controller/LecturerQuestionController.java
+++ b/src/main/java/de/thm/arsnova/controller/LecturerQuestionController.java
@@ -128,7 +128,7 @@ public class LecturerQuestionController extends PaginationController {
 			@RequestParam(value = "time", defaultValue = "0", required = false) final int time
 			) {
 
-		if(time == 0) {
+		if (time == 0) {
 			questionService.startNewPiRound(questionId, null);
 		} else {
 			questionService.startNewPiRoundDelayed(questionId, time);
@@ -621,7 +621,7 @@ public class LecturerQuestionController extends PaginationController {
 			@RequestBody String[] sortOrder
 			) {
 		try {
-			questionService.setSort(sessionkey, "", sorttype, ispreparation, sortOrder) ;
+			questionService.setSort(sessionkey, "", sorttype, ispreparation, sortOrder);
 		} catch (final Exception e) {
 			throw new BadRequestException();
 		}
diff --git a/src/main/java/de/thm/arsnova/controller/SecurityExceptionControllerAdvice.java b/src/main/java/de/thm/arsnova/controller/SecurityExceptionControllerAdvice.java
index 8b7f0907cd6a3bd930b4f4eeae0ca88c9e7fa936..9be2d966caf25d182e1f787886fefa179f11fa46 100644
--- a/src/main/java/de/thm/arsnova/controller/SecurityExceptionControllerAdvice.java
+++ b/src/main/java/de/thm/arsnova/controller/SecurityExceptionControllerAdvice.java
@@ -48,7 +48,7 @@ public class SecurityExceptionControllerAdvice {
 
 	@ExceptionHandler
 	@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
-	public Map<String,String> defaultExceptionHandler(
+	public Map<String, String> defaultExceptionHandler(
 			final Exception e,
 			final HttpServletRequest req
 			) {
diff --git a/src/main/java/de/thm/arsnova/controller/SessionController.java b/src/main/java/de/thm/arsnova/controller/SessionController.java
index 9d94ffc5aef21772162aec4df3b89455767c20d2..dd62c315fc1852d698806dea3cfec30c1b4db3fd 100644
--- a/src/main/java/de/thm/arsnova/controller/SessionController.java
+++ b/src/main/java/de/thm/arsnova/controller/SessionController.java
@@ -147,9 +147,9 @@ public class SessionController extends PaginationController {
 	@RequestMapping(value = "/", method = RequestMethod.GET)
 	@Pagination
 	public List<Session> getSessions(
-			@ApiParam(value="ownedOnly", required=true) @RequestParam(value = "ownedonly", defaultValue = "false") final boolean ownedOnly,
-			@ApiParam(value="visitedOnly", required=true) @RequestParam(value = "visitedonly", defaultValue = "false") final boolean visitedOnly,
-			@ApiParam(value="sortby", required=true) @RequestParam(value = "sortby", defaultValue = "name") final String sortby,
+			@ApiParam(value = "ownedOnly", required = true) @RequestParam(value = "ownedonly", defaultValue = "false") final boolean ownedOnly,
+			@ApiParam(value = "visitedOnly", required = true) @RequestParam(value = "visitedonly", defaultValue = "false") final boolean visitedOnly,
+			@ApiParam(value = "sortby", required = true) @RequestParam(value = "sortby", defaultValue = "name") final String sortby,
 			final HttpServletResponse response
 			) {
 		List<Session> sessions = null;
@@ -276,7 +276,7 @@ public class SessionController extends PaginationController {
 	@RequestMapping(value = "/{sessionkey}/lock", method = RequestMethod.POST)
 	public Session lockSession(
 			@ApiParam(value = "session-key from current session", required = true) @PathVariable final String sessionkey,
-			@ApiParam(value="lock", required=true) @RequestParam(required = false) final Boolean lock,
+			@ApiParam(value = "lock", required = true) @RequestParam(required = false) final Boolean lock,
 			@ApiParam(value = "http servlet response", required = true) final HttpServletResponse response
 			) {
 		if (lock != null) {
@@ -336,7 +336,7 @@ public class SessionController extends PaginationController {
 			nickname = "lockFeedbackInput")
 	public boolean lockFeedbackInput(
 			@ApiParam(value = "session-key from current session", required = true) @PathVariable final String sessionkey,
-			@ApiParam(value="lock", required=true) @RequestParam(required = true) final Boolean lock,
+			@ApiParam(value = "lock", required = true) @RequestParam(required = true) final Boolean lock,
 			@ApiParam(value = "http servlet response", required = true) final HttpServletResponse response
 			) {
 		return sessionService.lockFeedbackInput(sessionkey, lock);
diff --git a/src/main/java/de/thm/arsnova/controller/SocketController.java b/src/main/java/de/thm/arsnova/controller/SocketController.java
index 9dce5f7cf5c6df0792915a8b38f0cf9163c19a52..5862e85ec3fbd3b2cce9f73c974e107e8880d827 100644
--- a/src/main/java/de/thm/arsnova/controller/SocketController.java
+++ b/src/main/java/de/thm/arsnova/controller/SocketController.java
@@ -67,7 +67,7 @@ public class SocketController extends AbstractController {
 		@ApiResponse(code = 403, message = HTML_STATUS_403)
 	})
 	@RequestMapping(method = RequestMethod.POST, value = "/assign")
-	public void authorize(@ApiParam(value="sessionMap", required=true) @RequestBody final Map<String, String> sessionMap, @ApiParam(value="response", required=true) final HttpServletResponse response) {
+	public void authorize(@ApiParam(value = "sessionMap", required = true) @RequestBody final Map < String, String> sessionMap, @ApiParam(value = "response", required = true) final HttpServletResponse response) {
 		String socketid = sessionMap.get("session");
 		if (null == socketid) {
 			LOGGER.debug("Expected property 'session' missing", socketid);
diff --git a/src/main/java/de/thm/arsnova/controller/WelcomeController.java b/src/main/java/de/thm/arsnova/controller/WelcomeController.java
index cabe824f6bf9baa1cc3bf8c66531e5564af9c77a..54f88fd2401ec28e496e0d6460cefe8e7e594e9b 100644
--- a/src/main/java/de/thm/arsnova/controller/WelcomeController.java
+++ b/src/main/java/de/thm/arsnova/controller/WelcomeController.java
@@ -53,7 +53,7 @@ public class WelcomeController extends AbstractController {
 	@Value("${mobile.path}")
 	private String mobileContextPath;
 
-	@Resource(name="versionInfoProperties")
+	@Resource(name = "versionInfoProperties")
 	private Properties versionInfoProperties;
 
 	@RequestMapping(value = "/", method = RequestMethod.GET)
diff --git a/src/main/java/de/thm/arsnova/dao/CouchDBDao.java b/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
index c4432847a59d7bf7075dd1659ad46161b75ef2a2..680d870dfb780da965f1e39280f950aac1cf3a25 100644
--- a/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
+++ b/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
@@ -1773,8 +1773,8 @@ public class CouchDBDao implements IDatabaseDao, ApplicationEventPublisherAware
 		final List<String> unanswered = new ArrayList<String>();
 
 		for (final Question question : questions) {
-			if (!answered.containsKey(question.get_id()) ||
-				(answered.containsKey(question.get_id()) && answered.get(question.get_id()) != question.getPiRound())) {
+			if (!answered.containsKey(question.get_id())
+					|| (answered.containsKey(question.get_id()) && answered.get(question.get_id()) != question.getPiRound())) {
 				unanswered.add(question.get_id());
 			}
 		}
@@ -2275,7 +2275,7 @@ public class CouchDBDao implements IDatabaseDao, ApplicationEventPublisherAware
 			List<String> sort = new ArrayList<String>();
 			JSONArray json = d.getJSONObject("value").getJSONArray("sortOrder");
 			int len = json.size();
-			for (int i=0; i<len; i++) {
+			for (int i = 0; i < len; i++) {
 				sort.add(json.getString(i));
 			}
 			sortOrder.setSortOrder(sort);
@@ -2284,7 +2284,7 @@ public class CouchDBDao implements IDatabaseDao, ApplicationEventPublisherAware
 		return sortOrder;
 	}
 
-	@CachePut(value = "sortorder", key ="#sortOrder.sessionId.concat('-').concat(#sortOrder.questionVariant).concat('-').concat(#sortOrder.subject)")
+	@CachePut(value = "sortorder", key = "#sortOrder.sessionId.concat('-').concat(#sortOrder.questionVariant).concat('-').concat(#sortOrder.subject)")
 	@Override
 	public SortOrder createOrUpdateSortOrder(SortOrder sortOrder) {
 		try {
@@ -2317,7 +2317,7 @@ public class CouchDBDao implements IDatabaseDao, ApplicationEventPublisherAware
 		return null;
 	}
 
-	@CacheEvict(value = "sortorder", key ="#sortOrder.sessionId.concat('-').concat(#sortOrder.questionVariant).concat('-').concat(#sortOrder.subject)")
+	@CacheEvict(value = "sortorder", key = "#sortOrder.sessionId.concat('-').concat(#sortOrder.questionVariant).concat('-').concat(#sortOrder.subject)")
 	@Override
 	public void deleteSortOrder(SortOrder sortOrder) {
 		try {
@@ -2534,7 +2534,7 @@ public class CouchDBDao implements IDatabaseDao, ApplicationEventPublisherAware
 			if (null != id) {
 				d = database.getDocument(id, rev);
 			}
-			d.put("type","motdlist");
+			d.put("type", "motdlist");
 			d.put("username", motdlist.getUsername());
 			d.put("motdkeys", motdlist.getMotdkeys());
 
diff --git a/src/main/java/de/thm/arsnova/domain/LearningProgressFactory.java b/src/main/java/de/thm/arsnova/domain/LearningProgressFactory.java
index 8e50d4a5e275b0731d0ac5e5fc838375c1e1569e..9eb5d233bba59a7c8748c798d47d41febb78bab2 100644
--- a/src/main/java/de/thm/arsnova/domain/LearningProgressFactory.java
+++ b/src/main/java/de/thm/arsnova/domain/LearningProgressFactory.java
@@ -51,10 +51,10 @@ public class LearningProgressFactory implements NovaEventVisitor, ILearningProgr
 	}
 
 	@Override
-	public void visit(NewInterposedQuestionEvent event) {}
+	public void visit(NewInterposedQuestionEvent event) { }
 
 	@Override
-	public void visit(DeleteInterposedQuestionEvent deleteInterposedQuestionEvent) {}
+	public void visit(DeleteInterposedQuestionEvent deleteInterposedQuestionEvent) { }
 
 	@CacheEvict(value = "learningprogress", key = "#event.Session")
 	@Override
@@ -135,31 +135,31 @@ public class LearningProgressFactory implements NovaEventVisitor, ILearningProgr
 	}
 
 	@Override
-	public void visit(NewFeedbackEvent newFeedbackEvent) {}
+	public void visit(NewFeedbackEvent newFeedbackEvent) { }
 
 	@Override
-	public void visit(DeleteFeedbackForSessionsEvent deleteFeedbackEvent) {}
+	public void visit(DeleteFeedbackForSessionsEvent deleteFeedbackEvent) { }
 
 	@Override
-	public void visit(StatusSessionEvent statusSessionEvent) {}
+	public void visit(StatusSessionEvent statusSessionEvent) { }
 
 	@Override
-	public void visit(ChangeLearningProgressEvent changeLearningProgress) {}
+	public void visit(ChangeLearningProgressEvent changeLearningProgress) { }
 
 	@Override
-	public void visit(PiRoundDelayedStartEvent piRoundDelayedStartEvent) {}
+	public void visit(PiRoundDelayedStartEvent piRoundDelayedStartEvent) { }
 
 	@Override
-	public void visit(PiRoundEndEvent piRoundEndEvent) {}
+	public void visit(PiRoundEndEvent piRoundEndEvent) { }
 
 	@Override
-	public void visit(PiRoundCancelEvent piRoundCancelEvent) {}
+	public void visit(PiRoundCancelEvent piRoundCancelEvent) { }
 
 	@Override
-	public void visit(NewSessionEvent event) {}
+	public void visit(NewSessionEvent event) { }
 
 	@Override
-	public void visit(DeleteSessionEvent event) {}
+	public void visit(DeleteSessionEvent event) { }
 
 	@Override
 	public void setApplicationEventPublisher(ApplicationEventPublisher publisher) {
@@ -167,21 +167,21 @@ public class LearningProgressFactory implements NovaEventVisitor, ILearningProgr
 	}
 
 	@Override
-	public void visit(LockVoteEvent lockVoteEvent) {}
+	public void visit(LockVoteEvent lockVoteEvent) { }
 
 	@Override
-	public void visit(LockVotesEvent lockVotesEvent) {}
+	public void visit(LockVotesEvent lockVotesEvent) { }
 
 	@Override
-	public void visit(UnlockVoteEvent unlockVoteEvent) {}
+	public void visit(UnlockVoteEvent unlockVoteEvent) { }
 
 	@Override
-	public void visit(UnlockVotesEvent unlockVotesEvent) {}
+	public void visit(UnlockVotesEvent unlockVotesEvent) { }
 
 	@Override
-	public void visit(FeatureChangeEvent featureChangeEvent) {}
+	public void visit(FeatureChangeEvent featureChangeEvent) { }
 
 	@Override
-	public void visit(LockFeedbackEvent lockFeedbackEvent) {}
+	public void visit(LockFeedbackEvent lockFeedbackEvent) { }
 
 }
diff --git a/src/main/java/de/thm/arsnova/domain/PointBasedLearningProgress.java b/src/main/java/de/thm/arsnova/domain/PointBasedLearningProgress.java
index dfef1d348cb3a3f7b346a0979f02bd355b0b0356..a4314c51ca7d6cf8d85d89e13850dec6e77ee1a8 100644
--- a/src/main/java/de/thm/arsnova/domain/PointBasedLearningProgress.java
+++ b/src/main/java/de/thm/arsnova/domain/PointBasedLearningProgress.java
@@ -36,7 +36,7 @@ public class PointBasedLearningProgress extends VariantLearningProgress {
 		lpv.setCourseProgress(coursePercentage());
 		lpv.setNumQuestions(courseScore.getQuestionCount());
 		lpv.setNumUsers(courseScore.getTotalUserCount());
-		lpv.setNumerator(courseScore.getTotalUserScore()/courseScore.getTotalUserCount());
+		lpv.setNumerator(courseScore.getTotalUserScore() / courseScore.getTotalUserCount());
 		lpv.setDenominator(courseScore.getMaximumScore());
 		return lpv;
 	}
@@ -50,7 +50,7 @@ public class PointBasedLearningProgress extends VariantLearningProgress {
 		}
 		final double courseAverageValue = userTotalValue / numUsers;
 		final double courseProgress = courseAverageValue / courseMaximumValue;
-		return (int)Math.min(100, Math.round(courseProgress * 100));
+		return (int) Math.min(100, Math.round(courseProgress * 100));
 	}
 
 	@Override
@@ -72,6 +72,6 @@ public class PointBasedLearningProgress extends VariantLearningProgress {
 			return 0;
 		}
 		final double myProgress = userTotalValue / courseMaximumValue;
-		return (int)Math.min(100, Math.round(myProgress*100));
+		return (int) Math.min(100, Math.round(myProgress * 100));
 	}
 }
diff --git a/src/main/java/de/thm/arsnova/domain/QuestionBasedLearningProgress.java b/src/main/java/de/thm/arsnova/domain/QuestionBasedLearningProgress.java
index 200df8fc9c51b6a08bbee808fdba6641a653e628..93991710eb90e5cec322d9a0c124894b941a31d5 100644
--- a/src/main/java/de/thm/arsnova/domain/QuestionBasedLearningProgress.java
+++ b/src/main/java/de/thm/arsnova/domain/QuestionBasedLearningProgress.java
@@ -34,7 +34,7 @@ public class QuestionBasedLearningProgress extends VariantLearningProgress {
 	@Override
 	protected LearningProgressValues createCourseProgress() {
 		final int courseProgress = calculateCourseProgress();
-		final int numerator = courseScore.getQuestionCount()*courseProgress/100;
+		final int numerator = courseScore.getQuestionCount() * courseProgress / 100;
 		final int denominator = courseScore.getQuestionCount();
 		LearningProgressValues lpv = new LearningProgressValues();
 		lpv.setCourseProgress(courseProgress);
@@ -53,10 +53,10 @@ public class QuestionBasedLearningProgress extends VariantLearningProgress {
 			}
 			int numAnswers = questionScore.getUserCount();
 			if (numAnswers != 0) {
-				ratio += (double)countCorrectAnswers(questionScore) / (numAnswers * courseScore.getQuestionCount());
+				ratio += (double) countCorrectAnswers(questionScore) / (numAnswers * courseScore.getQuestionCount());
 			}
 		}
-		return (int) Math.min(100, Math.round(ratio*100));
+		return (int) Math.min(100, Math.round(ratio * 100));
 	}
 
 	private int countCorrectAnswers(QuestionScore questionScore) {
@@ -107,8 +107,8 @@ public class QuestionBasedLearningProgress extends VariantLearningProgress {
 	}
 
 	private int myPercentage(int numQuestionsCorrect, int questionCount) {
-		final double myLearningProgress = numQuestionsCorrect / (double)questionCount;
-		return (int) Math.min(100, Math.round(myLearningProgress*100));
+		final double myLearningProgress = numQuestionsCorrect / (double) questionCount;
+		return (int) Math.min(100, Math.round(myLearningProgress * 100));
 	}
 
 
diff --git a/src/main/java/de/thm/arsnova/domain/package-info.java b/src/main/java/de/thm/arsnova/domain/package-info.java
index 0733c68fb4c53a0c7fd357e3d6967e4fd21fc6c3..4995c742eaa8e7cb5f67adfe4ece28bf18ce9fcc 100644
--- a/src/main/java/de/thm/arsnova/domain/package-info.java
+++ b/src/main/java/de/thm/arsnova/domain/package-info.java
@@ -1,4 +1,4 @@
 /**
  * The 'M' in MVC
  */
-package de.thm.arsnova.domain;
\ No newline at end of file
+package de.thm.arsnova.domain;
diff --git a/src/main/java/de/thm/arsnova/entities/LearningProgressOptions.java b/src/main/java/de/thm/arsnova/entities/LearningProgressOptions.java
index 4667dae82299c4c4b775fa66912908d60e322c6e..e29f9a43eda5dcbd667b1f4caa2295391aad0498 100644
--- a/src/main/java/de/thm/arsnova/entities/LearningProgressOptions.java
+++ b/src/main/java/de/thm/arsnova/entities/LearningProgressOptions.java
@@ -35,7 +35,7 @@ public class LearningProgressOptions {
 		this.questionVariant = learningProgressOptions.getQuestionVariant();
 	}
 
-	public LearningProgressOptions() {}
+	public LearningProgressOptions() { }
 
 	@ApiModelProperty(required = true, value = "the type")
 	public String getType() {
diff --git a/src/main/java/de/thm/arsnova/entities/Motd.java b/src/main/java/de/thm/arsnova/entities/Motd.java
index 439f75db432de1ca669f515ab9be4e9c38400820..c9748b299c7d7948dd1ce1b453d4d65a412d7a25 100644
--- a/src/main/java/de/thm/arsnova/entities/Motd.java
+++ b/src/main/java/de/thm/arsnova/entities/Motd.java
@@ -88,7 +88,7 @@ public class Motd {
 		return audience;
 	}
 
-	public void setAudience(String a){
+	public void setAudience(String a) {
 		audience = a;
 	}
 
@@ -97,7 +97,7 @@ public class Motd {
 		return sessionkey;
 	}
 
-	public void setSessionkey(String a){
+	public void setSessionkey(String a) {
 		sessionkey = a;
 	}
 
diff --git a/src/main/java/de/thm/arsnova/entities/Question.java b/src/main/java/de/thm/arsnova/entities/Question.java
index f73d0bf9b79a1320e88e4bab9d48838febcfdcc5..c13f3d0947db08262e4c9a06ce4e87d821a068c4 100644
--- a/src/main/java/de/thm/arsnova/entities/Question.java
+++ b/src/main/java/de/thm/arsnova/entities/Question.java
@@ -596,7 +596,7 @@ public class Question implements Serializable {
 	}
 
 	public void updateRoundStartVariables(Date start, Date end) {
-		if(this.getPiRound() == 1 && this.isPiRoundFinished()) {
+		if (this.getPiRound() == 1 && this.isPiRoundFinished()) {
 			this.setPiRound(2);
 		}
 
@@ -613,7 +613,7 @@ public class Question implements Serializable {
 	public void updateRoundManagementState() {
 		final long time = new Date().getTime();
 
-		if(time > this.getPiRoundEndTime() && this.isPiRoundActive()) {
+		if (time > this.getPiRoundEndTime() && this.isPiRoundActive()) {
 			this.setPiRoundEndTime(0);
 			this.setPiRoundStartTime(0);
 			this.setPiRoundActive(false);
diff --git a/src/main/java/de/thm/arsnova/entities/SessionFeature.java b/src/main/java/de/thm/arsnova/entities/SessionFeature.java
index 4cbfbcd4ca1fac4daa2a220ae389e8e082fdbe9b..37686978251c9e594315f67ee895e0529b690ad4 100644
--- a/src/main/java/de/thm/arsnova/entities/SessionFeature.java
+++ b/src/main/java/de/thm/arsnova/entities/SessionFeature.java
@@ -59,7 +59,7 @@ public class SessionFeature {
 		}
 	}
 
-	public SessionFeature() {}
+	public SessionFeature() { }
 
 	public boolean isLecture() {
 		return lecture;
diff --git a/src/main/java/de/thm/arsnova/entities/SessionInfo.java b/src/main/java/de/thm/arsnova/entities/SessionInfo.java
index 18f2e5e2273702f45c6a881cd3dbb1ba3db4cf4b..c28150ba87e122397e910625a9981734c476d02c 100644
--- a/src/main/java/de/thm/arsnova/entities/SessionInfo.java
+++ b/src/main/java/de/thm/arsnova/entities/SessionInfo.java
@@ -58,7 +58,7 @@ public class SessionInfo {
 		this.ppSubject = session.getPpSubject();
 	}
 
-	public SessionInfo() {}
+	public SessionInfo() { }
 
 	public static List<SessionInfo> fromSessionList(List<Session> sessions) {
 		List<SessionInfo> infos = new ArrayList<SessionInfo>();
diff --git a/src/main/java/de/thm/arsnova/entities/transport/InterposedQuestion.java b/src/main/java/de/thm/arsnova/entities/transport/InterposedQuestion.java
index d950790c601f72ccbe831d4ec65df45cd99111d5..ce8b668d5ccb21496dfabf72828db31d4dd55db8 100644
--- a/src/main/java/de/thm/arsnova/entities/transport/InterposedQuestion.java
+++ b/src/main/java/de/thm/arsnova/entities/transport/InterposedQuestion.java
@@ -51,7 +51,7 @@ public class InterposedQuestion {
 		this.read = question.isRead();
 	}
 
-	public InterposedQuestion() {}
+	public InterposedQuestion() { }
 
 	@ApiModelProperty(required = true, value = "used to display Id")
 	public String getId() {
diff --git a/src/main/java/de/thm/arsnova/services/MotdService.java b/src/main/java/de/thm/arsnova/services/MotdService.java
index beeb901af10c8b68da292e0dfddfc61d790d43e2..f256b0ea00f6cfd1718b28831ae93c2d0e40cf67 100644
--- a/src/main/java/de/thm/arsnova/services/MotdService.java
+++ b/src/main/java/de/thm/arsnova/services/MotdService.java
@@ -99,7 +99,7 @@ public class MotdService implements IMotdService {
 			List<Motd> returns = new ArrayList<Motd>();
 			HashSet<String> keys = new HashSet(500);  // Or a more realistic size
 			StringTokenizer st = new StringTokenizer(motdlist.getMotdkeys(), ",");
-			while(st.hasMoreTokens())
+			while (st.hasMoreTokens())
    			keys.add(st.nextToken());
 			for (Motd motd : list) {
 				if (!keys.contains(motd.getMotdkey())) {
diff --git a/src/main/java/de/thm/arsnova/services/QuestionService.java b/src/main/java/de/thm/arsnova/services/QuestionService.java
index b8e46713dc6e127ddbc35a76087218e6259a79d8..6e7981f549526cff73638ef30a53db07fb02bfc2 100644
--- a/src/main/java/de/thm/arsnova/services/QuestionService.java
+++ b/src/main/java/de/thm/arsnova/services/QuestionService.java
@@ -224,7 +224,7 @@ public class QuestionService implements IQuestionService, ApplicationEventPublis
 		final Question question = databaseDao.getQuestion(questionId);
 		final Session session = databaseDao.getSessionFromKeyword(question.getSessionKeyword());
 
-		if(null == user) {
+		if (null == user) {
 			user = userService.getCurrentUser();
 		}
 
@@ -272,7 +272,7 @@ public class QuestionService implements IQuestionService, ApplicationEventPublis
 		cancelDelayedPiRoundChange(questionId);
 		question.resetRoundManagementState();
 
-		if(question.getPiRound() == 1) {
+		if (question.getPiRound() == 1) {
 			question.setPiRoundFinished(false);
 		} else {
 			question.setPiRound(1);
@@ -287,7 +287,7 @@ public class QuestionService implements IQuestionService, ApplicationEventPublis
 	public void cancelDelayedPiRoundChange(final String questionId) {
 		Timer timer = timerList.get(questionId);
 
-		if(null != timer) {
+		if (null != timer) {
 			timer.cancel();
 			timerList.remove(questionId);
 			timer.purge();
@@ -1123,13 +1123,13 @@ public class QuestionService implements IQuestionService, ApplicationEventPublis
 		List<String> tmpList = sortOrder.getSortOrder();
 		tmpList.add(toBeAdded);
 		sortOrder.setSortOrder(tmpList);
-		if("alphabet".equals(sortOrder.getSortType())) {
+		if ("alphabet".equals(sortOrder.getSortType())) {
 			sortOrder = alphabeticalSort(sortOrder);
 		}
 		return databaseDao.createOrUpdateSortOrder(sortOrder);
 	}
 
-	public void deleteQuestionFromSortOrder(Question question){
+	public void deleteQuestionFromSortOrder(Question question) {
 		SortOrder sortOrder = databaseDao.getSortOrder(question.getSessionId(), question.getQuestionVariant(), question.getSubject());
 		if (sortOrder != null) {
 			List<String> tempSortOrder = sortOrder.getSortOrder();
@@ -1226,7 +1226,7 @@ public class QuestionService implements IQuestionService, ApplicationEventPublis
 		}
 	}
 
-	public SortOrder alphabeticalSort(SortOrder sortOrder){
+	public SortOrder alphabeticalSort(SortOrder sortOrder) {
 		if (sortOrder.getSortOrder() == null) {
 			return null;
 		}
diff --git a/src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java b/src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java
index 0ae3d43007898bd6b06487754f18d8bcde281f53..b274390b0c90426b5ecee99fb6d8378f9deef75d 100644
--- a/src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java
+++ b/src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java
@@ -646,8 +646,8 @@ public class ARSnovaSocketIOServer implements ARSnovaSocket, NovaEventVisitor {
 	}
 
 	@Override
-	public void visit(NewSessionEvent event) {}
+	public void visit(NewSessionEvent event) { }
 
 	@Override
-	public void visit(DeleteSessionEvent event) {}
+	public void visit(DeleteSessionEvent event) { }
 }
diff --git a/src/main/java/de/thm/arsnova/web/CorsFilter.java b/src/main/java/de/thm/arsnova/web/CorsFilter.java
index 1b18de705c0cf6167ed3c7e0d9f6e0e1d4c5b998..0a7f003146f41fa479071c3ddd4a4ba88cb703b0 100644
--- a/src/main/java/de/thm/arsnova/web/CorsFilter.java
+++ b/src/main/java/de/thm/arsnova/web/CorsFilter.java
@@ -47,6 +47,6 @@ public class CorsFilter extends OncePerRequestFilter {
 	}
 
 	private String sanitizeOriginUrl(String originUrl) {
-		return originUrl.replaceAll("[\n\r]+"," ");
+		return originUrl.replaceAll("[\n\r]+", " ");
 	}
 }