Removed debug output, removed unused variables

src/main/java/de/thm/arsnova/FeedbackStorage.java

 package de.thm.arsnova;
 
 import java.util.Date;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -104,8 +103,6 @@ public class FeedbackStorage {
 			data.put(keyword, new ConcurrentHashMap<String, FeedbackStorageObject>());
 		}
 		
-		System.out.println(user.getUsername());
-		
 		data.get(keyword).put(user.getUsername(), new FeedbackStorageObject(value, user));
 		return true;
 	}

src/main/java/de/thm/arsnova/aop/UserSessionAspect.java

 package de.thm.arsnova.aop;
 
-import java.util.UUID;
-
 import org.aspectj.lang.JoinPoint;
 import org.aspectj.lang.annotation.AfterReturning;
 import org.aspectj.lang.annotation.Aspect;

src/test/java/de/thm/arsnova/controller/FeedbackControllerTest.java

@@ -20,7 +20,6 @@ import org.springframework.web.servlet.HandlerAdapter;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter;
 
-import de.thm.arsnova.FeedbackStorage;
 import de.thm.arsnova.dao.StubDatabaseDao;
 import de.thm.arsnova.exceptions.NoContentException;
 import de.thm.arsnova.exceptions.NotFoundException;
@@ -49,8 +48,6 @@ public class FeedbackControllerTest {
 	@Autowired
 	private StubDatabaseDao databaseDao;
 	
-	private FeedbackStorage feedbackStorage;
-
 	@After
 	public final void cleanup() {
 		databaseDao.cleanupTestData();
@@ -61,7 +58,6 @@ public class FeedbackControllerTest {
 		this.request = new MockHttpServletRequest();
 		this.response = new MockHttpServletResponse();
 		handlerAdapter = applicationContext.getBean(AnnotationMethodHandlerAdapter.class);
-		this.feedbackStorage = new FeedbackStorage(databaseDao); 
 	}
 
 	@Test(expected = NotFoundException.class)

src/test/java/de/thm/arsnova/services/FeedbackServiceTest.java

@@ -166,9 +166,6 @@ public class FeedbackServiceTest {
 	public static class TestUser extends User {
 		private static final long serialVersionUID = 1L;
 		
-		private String username;
-		private String type;
-
 		public TestUser(String username) {
 			super( new UsernamePasswordAuthenticationToken(username, "secret") );
 		}