diff --git a/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java b/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
index 156bc5f..0cefee6 100644
--- a/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
+++ b/YACOSCore/ejbModule/org/yacos/core/article/ArticleManagerBean.java
@@ -68,7 +68,6 @@ public class ArticleManagerBean implements IArticleManager, Serializable {
 				ut.rollback();
 				e.printStackTrace();
 			} catch (Exception e1) {
-				// TODO Auto-generated catch block
 				e1.printStackTrace();
 			}
 		}
diff --git a/YACOSCore/ejbModule/org/yacos/core/conferences/Conference.java b/YACOSCore/ejbModule/org/yacos/core/conferences/Conference.java
index 523e091..0fdd18b 100644
--- a/YACOSCore/ejbModule/org/yacos/core/conferences/Conference.java
+++ b/YACOSCore/ejbModule/org/yacos/core/conferences/Conference.java
@@ -15,6 +15,7 @@ import javax.persistence.OneToMany;
 import javax.persistence.OneToOne;
 import javax.persistence.Temporal;
 import javax.persistence.TemporalType;
+import javax.persistence.Transient;
 
 import org.yacos.core.article.Article;
 import org.yacos.core.evaluation.Criterion;
@@ -24,8 +25,11 @@ import org.yacos.core.users.User;
 
 @Entity
 public class Conference implements Serializable{
+	private static final long serialVersionUID = 7278920769049538175L;
 	
-	private static final long serialVersionUID = 1L;
+	public enum Phase {
+		CALL_FOR_PAPER, ARTICLE_EVALUATION, PROGRAM_VALIDATED, PAST
+	};
 	
 	@Id
 	@GeneratedValue(strategy=GenerationType.AUTO)
@@ -201,5 +205,27 @@ public class Conference implements Serializable{
 	public void setCriterions(List<Criterion> criterions) {
 		this.criterions = criterions;
 	}
+	
+	/**
+	 * Gets the current phase of the conference programmation
+	 * Phase.CALL_FOR_PAPER : Before the submission deadline
+	 * Phase.ARTICLE_EVALUATION : Before the evaluation deadline
+	 * Phase.PROGRAM_VALIDATED : Before the end of the conference
+	 * Phase.PAST : After the end of the conference
+	 * @return
+	 */
+	@Transient
+	public Phase getCurrentPhase() {
+		Date currentDate = new Date();
+		if(currentDate.before(this.dateArticle)){
+			return Phase.CALL_FOR_PAPER;
+		} else if(currentDate.before(this.dateEvaluation)){
+			return Phase.ARTICLE_EVALUATION;
+		} else if(currentDate.before(this.dateEnd)){
+			return Phase.PROGRAM_VALIDATED;
+		} else {
+			return Phase.PAST;
+		}
+	}
 
 }
diff --git a/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java b/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
index 154aa15..7fcc222 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
@@ -1,10 +1,7 @@
 package org.yacos.core.users;
 
 import java.util.List;
-
 import javax.ejb.Remote;
-
-import org.yacos.core.exceptions.NoConferenceCreationTokenLeftException;
 import org.yacos.core.exceptions.PKAlreadyUsedException;
 import org.yacos.core.exceptions.UserEMailAlreadyExistsException;
 import org.yacos.core.system.InvitationToken;