--- a/src/main/java/de/mpiwg/itgroup/ismi/util/guiComponents/EntityList.java	Fri Dec 09 21:18:27 2016 +0100
+++ b/src/main/java/de/mpiwg/itgroup/ismi/util/guiComponents/EntityList.java	Tue Dec 13 19:04:45 2016 +0100
@@ -18,28 +18,32 @@
 import de.mpiwg.itgroup.ismi.auxObjects.ListenerObject;
 import de.mpiwg.itgroup.ismi.entry.beans.AbstractISMIBean;
 
-public class EntityList extends AbstractISMIBean{
+public class EntityList extends AbstractISMIBean {
 	
-	private static final long serialVersionUID = -3339006604248018647L;
+	protected static final long serialVersionUID = -3339006604248018647L;
 
-	private static Logger logger = Logger.getLogger(EntityList.class);
+	protected static Logger logger = Logger.getLogger(EntityList.class);
 	
-	private List<Entity> entities = new ArrayList<Entity>();
-	private Map<Long, Boolean> selections = new HashMap<Long, Boolean>();
-	private String title;
+	protected List<Entity> entities = new ArrayList<Entity>();
+	protected Map<Long, Boolean> selections = new HashMap<Long, Boolean>();
+	protected String title;
 	
 	//some relations have an attribute date
-	private boolean useCalendar;
-	private Map<Long, Calendar> calendarMap;
+	protected boolean useCalendar;
+	protected Map<Long, Calendar> calendarMap;
 	
-	private ListenerObject lo;
+	protected ListenerObject lo;
+	
+	protected String input;
+	protected Long id;
 	
-	private String input;
-	private Long id;
+	protected WrapperService otg;
+	protected String user;
+
+	public EntityList() {
+	    // empty default constructor
+	}
 	
-	private WrapperService otg;
-	private String user;
-
 	public EntityList(String oc, String attName, String title){
 		this.lo = new ListenerObject(oc, attName);
 		this.title = title;
@@ -146,6 +150,11 @@
 		}
 	}
 
+	/**
+	 * Add an Entity to the list.
+	 * 
+	 * @param e
+	 */
 	public void add(Entity e){
 		if(e != null && e.isPersistent()){
 			if(!selections.containsKey(e.getId())){
@@ -160,6 +169,12 @@
 		}
 	}
 	
+	/**
+	 * Add an Entity with a calendar Attribute to the list.
+	 * 
+	 * @param e
+	 * @param calendarAtt
+	 */
 	public void add(Entity e, Attribute calendarAtt){
 		if(e != null && e.isPersistent()){
 			if(!selections.containsKey(e.getId())){