diff --git a/YACOSCore/.classpath b/YACOSCore/.classpath
index 7bb45a3..298d8f1 100644
--- a/YACOSCore/.classpath
+++ b/YACOSCore/.classpath
@@ -4,6 +4,5 @@
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 	<classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.generic.runtimeTarget/JBoss v4.2"/>
 	<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
 	<classpathentry kind="output" path="build/classes"/>
 </classpath>
diff --git a/YACOSCore/ejbModule/org/yacos/core/article/Article.java b/YACOSCore/ejbModule/org/yacos/core/article/Article.java
index 1a57ff6..8d3436b 100644
--- a/YACOSCore/ejbModule/org/yacos/core/article/Article.java
+++ b/YACOSCore/ejbModule/org/yacos/core/article/Article.java
@@ -3,6 +3,7 @@ package org.yacos.core.article;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
+
 import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.EnumType;
@@ -15,6 +16,7 @@ import javax.persistence.JoinTable;
 import javax.persistence.ManyToMany;
 import javax.persistence.ManyToOne;
 import javax.persistence.OneToMany;
+
 import org.yacos.core.conferences.Conference;
 import org.yacos.core.evaluation.Report;
 import org.yacos.core.users.User;
diff --git a/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java b/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
index 0338722..e78657f 100644
--- a/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
+++ b/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
@@ -3,6 +3,7 @@ package org.yacos.core.article;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
+
 import javax.annotation.Resource;
 import javax.ejb.Stateless;
 import javax.ejb.TransactionManagement;
@@ -140,9 +141,9 @@ public class ArticleManagerBean implements IArticleManager, Serializable {
 		query.setParameter(2, author);
 		return query.getResultList();
 	}
-	     
+	
+	@SuppressWarnings("unchecked")
 	public List<Article> getArticlesOfMember(Integer confId, String memberId){
-		
 		Conference conf = em.find(Conference.class, confId);
 		User member = em.find(User.class, memberId);
 		Query query = em.createQuery("from Article a join a.pcMembers m WHERE a.conference = ? and m = ? ORDER BY a.title");
diff --git a/YACOSCore/ejbModule/org/yacos/core/article/Delegation.java b/YACOSCore/ejbModule/org/yacos/core/article/Delegation.java
index 42584b6..56f1d9b 100644
--- a/YACOSCore/ejbModule/org/yacos/core/article/Delegation.java
+++ b/YACOSCore/ejbModule/org/yacos/core/article/Delegation.java
@@ -9,6 +9,7 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+
 import org.yacos.core.users.User;
 
 /**
diff --git a/YACOSCore/ejbModule/org/yacos/core/conferences/Conference.java b/YACOSCore/ejbModule/org/yacos/core/conferences/Conference.java
index 5cc2349..cf8b257 100644
--- a/YACOSCore/ejbModule/org/yacos/core/conferences/Conference.java
+++ b/YACOSCore/ejbModule/org/yacos/core/conferences/Conference.java
@@ -4,6 +4,7 @@ import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+
 import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
@@ -12,6 +13,7 @@ import javax.persistence.Id;
 import javax.persistence.OneToMany;
 import javax.persistence.Temporal;
 import javax.persistence.TemporalType;
+
 import org.yacos.core.article.Article;
 import org.yacos.core.evaluation.Criterion;
 import org.yacos.core.users.Role;
diff --git a/YACOSCore/ejbModule/org/yacos/core/conferences/ConferenceManagerBean.java b/YACOSCore/ejbModule/org/yacos/core/conferences/ConferenceManagerBean.java
index 5f2e108..9daa907 100644
--- a/YACOSCore/ejbModule/org/yacos/core/conferences/ConferenceManagerBean.java
+++ b/YACOSCore/ejbModule/org/yacos/core/conferences/ConferenceManagerBean.java
@@ -3,10 +3,12 @@ package org.yacos.core.conferences;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+
 import javax.ejb.Stateless;
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
 import javax.persistence.Query;
+
 import org.yacos.core.evaluation.Criterion;
 import org.yacos.core.exceptions.ConferenceDoesntExistException;
 import org.yacos.core.system.InvitationToken;
diff --git a/YACOSCore/ejbModule/org/yacos/core/evaluation/Rating.java b/YACOSCore/ejbModule/org/yacos/core/evaluation/Rating.java
index 30dc052..f53be47 100644
--- a/YACOSCore/ejbModule/org/yacos/core/evaluation/Rating.java
+++ b/YACOSCore/ejbModule/org/yacos/core/evaluation/Rating.java
@@ -6,7 +6,6 @@ package org.yacos.core.evaluation;
 import java.io.Serializable;
 
 import javax.persistence.Entity;
-
 import javax.persistence.Id;
 import javax.persistence.IdClass;
 import javax.persistence.JoinColumn;
diff --git a/YACOSCore/ejbModule/org/yacos/core/evaluation/Report.java b/YACOSCore/ejbModule/org/yacos/core/evaluation/Report.java
index 38ed20a..dabe3c9 100644
--- a/YACOSCore/ejbModule/org/yacos/core/evaluation/Report.java
+++ b/YACOSCore/ejbModule/org/yacos/core/evaluation/Report.java
@@ -6,9 +6,7 @@ package org.yacos.core.evaluation;
 import java.io.Serializable;
 import java.util.List;
 
-import javax.persistence.CascadeType;
 import javax.persistence.Entity;
-import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
diff --git a/YACOSCore/ejbModule/org/yacos/core/system/InvitationToken.java b/YACOSCore/ejbModule/org/yacos/core/system/InvitationToken.java
index 5aa0d3b..8652689 100644
--- a/YACOSCore/ejbModule/org/yacos/core/system/InvitationToken.java
+++ b/YACOSCore/ejbModule/org/yacos/core/system/InvitationToken.java
@@ -12,6 +12,7 @@ import javax.persistence.Id;
 import javax.persistence.IdClass;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+
 import org.yacos.core.conferences.Conference;
 import org.yacos.core.users.Role.RoleType;
 
diff --git a/YACOSCore/ejbModule/org/yacos/core/system/InvitationTokenPK.java b/YACOSCore/ejbModule/org/yacos/core/system/InvitationTokenPK.java
index 0676851..b968d00 100644
--- a/YACOSCore/ejbModule/org/yacos/core/system/InvitationTokenPK.java
+++ b/YACOSCore/ejbModule/org/yacos/core/system/InvitationTokenPK.java
@@ -1,8 +1,10 @@
 package org.yacos.core.system;
 
 import java.io.Serializable;
+
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+
 import org.yacos.core.conferences.Conference;
 import org.yacos.core.users.Role.RoleType;
 
diff --git a/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java b/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
index b26539c..2357cf9 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
@@ -4,7 +4,6 @@ import java.util.List;
 
 import javax.ejb.Remote;
 
-import org.yacos.core.conferences.Conference;
 import org.yacos.core.exceptions.PKAlreadyUsedException;
 import org.yacos.core.exceptions.UserEMailAlreadyExistsException;
 import org.yacos.core.system.InvitationToken;
diff --git a/YACOSCore/ejbModule/org/yacos/core/users/User.java b/YACOSCore/ejbModule/org/yacos/core/users/User.java
index 7bc71e7..900a5d2 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/User.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/User.java
@@ -5,13 +5,13 @@ import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.List;
+
 import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.JoinTable;
-
 import javax.persistence.ManyToMany;
 import javax.persistence.OneToMany;
 import javax.persistence.Table;
diff --git a/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java b/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
index b4f05f7..d879e9e 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
@@ -7,13 +7,11 @@ package org.yacos.core.users;
 import java.util.List;
 
 import javax.ejb.Stateless;
-
 import javax.persistence.EntityManager;
 import javax.persistence.NoResultException;
 import javax.persistence.PersistenceContext;
 import javax.persistence.Query;
 
-
 import org.yacos.core.conferences.Conference;
 import org.yacos.core.exceptions.PKAlreadyUsedException;
 import org.yacos.core.exceptions.UserEMailAlreadyExistsException;