code: private Difference createNullObject()
      {
          Difference difference = new Difference();
          difference.setClassName("");
          difference.setMethod("");
          difference.setField("");
          difference.setFrom("");
          difference.setTo("");
          difference.setJustification( bundle.getString( "report.clirr.api.changes.unjustified" ) );
          return difference;
      }
docs: Use a null object to avoid doing null checks everywhere.