code: protected void postInit(Connection connection) throws SQLException
     {
        String select =
           "select * from " + DBInitializerHelper.getItemTableName(containerConfig) + " where ID='"
              + Constants.ROOT_PARENT_UUID + "' and PARENT_ID='" + Constants.ROOT_PARENT_UUID + "'";
  
        if (!connection.createStatement().executeQuery(select).next())
        {
           String insert = DBInitializerHelper.getRootNodeInitializeScript(containerConfig);
           connection.createStatement().executeUpdate(insert);
        }
     }
docs: Init root node parent record.