@Override
  public void onCreate(SQLiteDatabase db) {

    JobInstancesTable.onCreate(db);
    //        JobExecutionTable.onCreate(db);
    //        StepExecutionTable.onCreate(db);
  }
 @Override
 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
   JobInstancesTable.onUpgrade(db, oldVersion, newVersion);
   //        JobExecutionTable.onUpgrade(db,oldVersion,newVersion);
   //        StepExecutionTable.onUpgrade(db,oldVersion,newVersion);
 }