code: public void addPropertiesOverwrite(final String _sytemConfig,
                                         final String _attribute)
      {
          this.properties.put(Overwrite.SYSTEMCONFIG.value(), _sytemConfig);
          this.properties.put(Overwrite.ATTRIBUTE.value(), _attribute);
      }
docs: Adds the properties overwrite.
  
  @param _sytemConfig the sytem config
  @param _attribute the attribute