protected function addContent()
    {
        try {
            $default = Content::defaultContent();
            $this->db->createCommand()->batchInsert(
                    Content::tableName(),
                    ['name', 'topic', 'content'],
                    [
                        [
                            Content::TERMS_AND_CONDS,
                            $default[Content::TERMS_AND_CONDS]['topic'],
                            $default[Content::TERMS_AND_CONDS]['content']
                        ],
                        [
                            Content::EMAIL_REGISTRATION,
                            $default[Content::EMAIL_REGISTRATION]['topic'],
                            $default[Content::EMAIL_REGISTRATION]['content']
                        ],
                        [
                            Content::EMAIL_PASSWORD,
                            $default[Content::EMAIL_PASSWORD]['topic'],
                            $default[Content::EMAIL_PASSWORD]['content']
                        ],
                        [
                            Content::EMAIL_REACTIVATION,
                            $default[Content::EMAIL_REACTIVATION]['topic'],
                            $default[Content::EMAIL_REACTIVATION]['content']
                        ],
                        [
                            Content::EMAIL_NEW,
                            $default[Content::EMAIL_NEW]['topic'],
                            $default[Content::EMAIL_NEW]['content']
                        ],
                        [
                            Content::EMAIL_SUBSCRIPTION,
                            $default[Content::EMAIL_SUBSCRIPTION]['topic'],
                            $default[Content::EMAIL_SUBSCRIPTION]['content']
                        ],
                    ]
                )->execute();
            return $this->returnSuccess(Yii::t('podium/flash', 'Default Content has been added.'));
        } catch (Exception $e) {
            return $this->returnError($e->getMessage(), __METHOD__,
                Yii::t('podium/flash', 'Error during content adding')
            );
        }
    }