public function closeAction(Event $event)
 {
     $closeEvent = new Event();
     $closeEvent->setIdentifier($event->getIdentifier());
     $closeEvent->setSystem($event->getSystem());
     $closeEvent->setStatus('success');
     $closeEvent->setMessage('manually closed');
     $em = $this->getDoctrine()->getEntityManager();
     $em->persist($closeEvent);
     $em->flush();
     return $this->redirect($this->generateUrl("bauer_incident_dashboard_core_admin"));
 }