public function addSettingsFile() {
        $config = new Zend_Config(array(), true);
        $config->gumball = array();
        $config->gumball->sourceDbEnvironment = $this->_dbEnv;

        $writer = new Zend_Config_Writer_Ini(
            array(
                'config' => $config,
                'filename' => $this->_getTargetDirectoryPath() . '/application/configs/gumball.ini'
            )
        );
        $writer->setRenderWithoutSections();
        $writer->write();
    }