bug5525: fixed NPEs in MediaTrack and missing refresher update when creating default leaderboard groups in create event workflow.

java/com.sap.sailing.domain.common/src/com/sap/sailing/domain/common/media/MediaTrack.java

@@ -143,25 +143,11 @@ public class MediaTrack implements Serializable, WithQualifiedObjectIdentifier {
     }
 
     public boolean beginsAfter(Date date) {
-        if (date == null) {
-            return false;
-        } else if (startTime.asDate().after(date)) {
-            return true;
-        } else {
-            return false;
-        }
+        return startTime != null && date != null && startTime.asDate().after(date);
     }
 
     public boolean endsBefore(Date date) {
-        if (date == null) {
-            return false;
-        } else if (duration == null) {
-            return false; //null-duration implies open-ended!
-        } else if (deriveEndTime().asDate().before(date)) {
-            return true;
-        } else {
-            return false;
-        }
+        return date != null && deriveEndTime() != null && deriveEndTime().asDate().before(date);
     }
 
     @Override

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/EventListComposite.java

@@ -592,6 +592,8 @@ public class EventListComposite extends Composite {
                                         } else {
                                             errorReporter.reportError("Could not find the event with name "+newEvent.getName()+" to which the leaderboardgroup should be added");
                                         }
+                                        presenter.getLeaderboardGroupsRefresher().add(newGroup);
+                                        presenter.getLeaderboardGroupsRefresher().callAllFill();
                                         openCreateDefaultRegattaDialog(newEvent);
                                     }
                                 }));