diff --git a/src/main/java/de/thm/arsnova/FeedbackStorage.java b/src/main/java/de/thm/arsnova/FeedbackStorage.java
index dd46e15ef7ff372f3de6cfde4c25eac96d7d72b3..dcdd11b845d1301489dee7d6f08e4e47baeaddf1 100644
--- a/src/main/java/de/thm/arsnova/FeedbackStorage.java
+++ b/src/main/java/de/thm/arsnova/FeedbackStorage.java
@@ -40,7 +40,7 @@ public class FeedbackStorage {
 	private IDatabaseDao dao;
 	
 	public FeedbackStorage(IDatabaseDao newDao) {
-		this.data = new ConcurrentHashMap<String, Map<String,FeedbackStorageObject>>();
+		this.data = new ConcurrentHashMap<String, Map<String, FeedbackStorageObject>>();
 		this.dao = newDao;
 	}
 
diff --git a/src/main/java/de/thm/arsnova/dao/CouchDBDao.java b/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
index 8c215c599fcaea3ecccb1e52338e125a72074075..fa3b627f64a68ff157a0513bc2ac99514a3e2855 100644
--- a/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
+++ b/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
@@ -1023,8 +1023,7 @@ public class CouchDBDao implements IDatabaseDao {
 			sb.append("]");
 			try {
 				this.setKeys(URLEncoder.encode(sb.toString(), "UTF-8"));
-			}
-			catch (UnsupportedEncodingException e) {
+			} catch (UnsupportedEncodingException e) {
 				LOGGER.error("Error while encoding course ID keys", e);
 			}
 		}
diff --git a/src/main/java/de/thm/arsnova/entities/LoggedIn.java b/src/main/java/de/thm/arsnova/entities/LoggedIn.java
index f44650438b17212e99a9183dcd038155ed714aee..1c4b91719ebaf41eb769b65fbb016a458d120555 100644
--- a/src/main/java/de/thm/arsnova/entities/LoggedIn.java
+++ b/src/main/java/de/thm/arsnova/entities/LoggedIn.java
@@ -122,7 +122,7 @@ public class LoggedIn {
 	}
 
 	public boolean hasConflicts() {
-		return ! (_conflicts == null || _conflicts.isEmpty());
+		return !(_conflicts == null || _conflicts.isEmpty());
 	}
 
 	@Override
@@ -132,4 +132,4 @@ public class LoggedIn {
 				+ ", timestamp=" + timestamp + ", visitedSessions="
 				+ visitedSessions + "]";
 	}
-}
\ No newline at end of file
+}
diff --git a/src/main/java/de/thm/arsnova/events/Publisher.java b/src/main/java/de/thm/arsnova/events/Publisher.java
index c8906725eeaa6280d3a103feefa6d15ce41a8f45..ac5b64fa218f3668198e2c1ac74c64bd22de8aa3 100644
--- a/src/main/java/de/thm/arsnova/events/Publisher.java
+++ b/src/main/java/de/thm/arsnova/events/Publisher.java
@@ -1,6 +1,5 @@
 package de.thm.arsnova.events;
 
-import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
@@ -13,7 +12,7 @@ public class Publisher implements ApplicationContextAware {
 	private ApplicationContext context;
 
 	@Override
-	public void setApplicationContext(ApplicationContext c) throws BeansException {
+	public void setApplicationContext(ApplicationContext c) {
 		this.context = c;
 	}
 
diff --git a/src/main/java/de/thm/arsnova/services/UserSessionService.java b/src/main/java/de/thm/arsnova/services/UserSessionService.java
index df3110cd50221cba01a1dc79b7ddb1951271091a..170030f67b8e6076203f9b2f2f780be73f8f45e3 100644
--- a/src/main/java/de/thm/arsnova/services/UserSessionService.java
+++ b/src/main/java/de/thm/arsnova/services/UserSessionService.java
@@ -30,4 +30,4 @@ public interface UserSessionService {
 	boolean isAuthenticated();
 	
 	void sendEventViaWebSocket(ARSnovaSocketIOServer server, ARSnovaEvent event);
-}
\ No newline at end of file
+}
diff --git a/src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java b/src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java
index f9d41fcd95e3c1052b9ffc906ecb69424a3cc0bf..aba71f925a0086d5998967c9f9b3fc4cb4feaff6 100644
--- a/src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java
+++ b/src/main/java/de/thm/arsnova/socket/ARSnovaSocketIOServer.java
@@ -109,7 +109,7 @@ public class ARSnovaSocketIOServer {
 				 * a feedback
 				 */
 				User u = userService.getUser2SocketId(client.getSessionId());
-				if (u == null || ! userService.isUserInSession(u, data.getSessionkey())) {
+				if (u == null || !userService.isUserInSession(u, data.getSessionkey())) {
 					return;
 				}
 				feedbackService.saveFeedback(data.getSessionkey(), data.getValue(), u);