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

@@ -1,9 +1,16 @@
 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;