/**
  * @param Event $event
  * @param $mediaData
  * @param $locale
  * @return bool
  * @throws EventDependencyNotFoundException
  * @throws \Sulu\Bundle\MediaBundle\Media\Exception\MediaNotFoundException
  */
 protected function addMedia(Event $event, $mediaData, $locale)
 {
     $media = $this->mediaManager->getById($mediaData, $locale);
     if (!$media) {
         throw new EventDependencyNotFoundException(MediaManager::ENTITY_NAME_MEDIA, $mediaData);
     }
     $media = $media->getEntity();
     $event->addMedia($media);
     $this->entityManager->persist($media);
     return true;
 }