/**
* Initializes the persistence manager
*
* @return void
* @throws MissingBackendException
*/
public function initializeObject()
{
if (!$this->backend instanceof Backend\BackendInterface) {
throw new MissingBackendException('A persistence backend must be set prior to initializing the persistence manager.', 1215508456);
}
$this->backend->setPersistenceManager($this);
$this->backend->initialize($this->settings['backendOptions']);
}