YACOSCore/ejbModule/org/yacos/core/article/PreferencePK.java

@@ -1,10 +1,17 @@
 package org.yacos.core.article;
 
 
+import java.io.Serializable;
+
 import org.yacos.core.users.User;
 
-public class PreferencePK {
+public class PreferencePK implements Serializable{
 	
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
 	private User pcMember;
 	
 	private Article article;