public static void addDatabaseSourceId(IMemento memento) {
   if (memento != null) {
     try {
       memento.putString(MEMENTO_SOURCE_GUID, OseeInfo.getDatabaseGuid());
     } catch (OseeCoreException ex) {
       OseeLog.log(Activator.class, Level.WARNING, "Unable to set memento source db guid");
     }
   }
 }
 public static boolean isSourceValid(IMemento memento) throws OseeCoreException {
   boolean result = false;
   if (memento != null) {
     String dbId = memento.getString(MEMENTO_SOURCE_GUID);
     if (Strings.isValid(dbId)) {
       String currentDbId = null;
       try {
         currentDbId = OseeInfo.getDatabaseGuid();
       } catch (OseeDataStoreException ex) {
         OseeLog.log(Activator.class, Level.WARNING, "Unable to set memento source db guid");
       }
       if (dbId.equals(currentDbId)) {
         result = true;
       }
     }
   }
   return result;
 }