Index: lams_tool_chat/src/java/org/lamsfoundation/lams/tool/chat/model/ChatSession.java
===================================================================
diff -u -r08950e1090443c3423a3d1c587416a2fccd8bbdf -r98331988096b8f31bbeb8079218f33c7367a0b65
--- lams_tool_chat/src/java/org/lamsfoundation/lams/tool/chat/model/ChatSession.java	(.../ChatSession.java)	(revision 08950e1090443c3423a3d1c587416a2fccd8bbdf)
+++ lams_tool_chat/src/java/org/lamsfoundation/lams/tool/chat/model/ChatSession.java	(.../ChatSession.java)	(revision 98331988096b8f31bbeb8079218f33c7367a0b65)
@@ -60,7 +60,7 @@
 
 	private Chat chat;
 
-	private Set chatUsers = new HashSet(0);
+	private Set chatUsers;
 	
 	private String jabberRoom;
 	
Index: lams_tool_notebook/src/java/org/lamsfoundation/lams/tool/notebook/model/NotebookSession.java
===================================================================
diff -u -r08950e1090443c3423a3d1c587416a2fccd8bbdf -r98331988096b8f31bbeb8079218f33c7367a0b65
--- lams_tool_notebook/src/java/org/lamsfoundation/lams/tool/notebook/model/NotebookSession.java	(.../NotebookSession.java)	(revision 08950e1090443c3423a3d1c587416a2fccd8bbdf)
+++ lams_tool_notebook/src/java/org/lamsfoundation/lams/tool/notebook/model/NotebookSession.java	(.../NotebookSession.java)	(revision 98331988096b8f31bbeb8079218f33c7367a0b65)
@@ -60,7 +60,7 @@
 
 	private Notebook notebook;
 
-	private Set notebookUsers = new HashSet(0);
+	private Set notebookUsers;
 
 	// Constructors