Index: lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/GroupDTO.java
===================================================================
diff -u -r7475d08afc280b5e2e5ddf04e8bf35e3166aaf80 -r14ed4a70dd8a2a61be0e780c0adfba9737b99477
--- lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/GroupDTO.java	(.../GroupDTO.java)	(revision 7475d08afc280b5e2e5ddf04e8bf35e3166aaf80)
+++ lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/GroupDTO.java	(.../GroupDTO.java)	(revision 14ed4a70dd8a2a61be0e780c0adfba9737b99477)
@@ -57,10 +57,14 @@
     private List userList;
     private Integer groupUIID;
 
+    public GroupDTO() {
+
+    }
+
     /**
      * Get the DTO for this group. Does not include the GroupBranchActivities as they will
      * be in a separate array for Authoring.
-     * 
+     *
      * @param group
      */
     @SuppressWarnings("unchecked")
Index: lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/GroupingDTO.java
===================================================================
diff -u -r7475d08afc280b5e2e5ddf04e8bf35e3166aaf80 -r14ed4a70dd8a2a61be0e780c0adfba9737b99477
--- lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/GroupingDTO.java	(.../GroupingDTO.java)	(revision 7475d08afc280b5e2e5ddf04e8bf35e3166aaf80)
+++ lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/GroupingDTO.java	(.../GroupingDTO.java)	(revision 14ed4a70dd8a2a61be0e780c0adfba9737b99477)
@@ -52,6 +52,10 @@
     // list of GroupDTO
     private List groups;
 
+    public GroupingDTO() {
+
+    }
+
     public GroupingDTO(Long groupingID, Integer groupingUIID, Integer groupingType, Integer numberOfGroups,
 	    Integer learnersPerGroup, Long staffGroupID, Integer maxNumberOfGroups,
 	    Boolean equalNumberOfLearnersPerGroup, Boolean viewStudentsBeforeSelection, List groupDTOs) {