public function cleanEventName($eventName)
    {
        $eventName = strtolower($eventName);
        $eventName = str_replace('..', '.', $eventName);
        $eventName = trim($eventName, '.');
        $eventName = trim($eventName);

        if (!$eventName) {
            throw new Exception('Event name is empty!');
        }

        return $eventName;
    }