public static function addProject($em, $parameters)
 {
     $project = new Project();
     $project->setName($parameters->name);
     $project->setBudget($parameters->budget);
     $project->setTime($parameters->time);
     $project->setPercentWorkers($parameters->percentWorkers);
     $project->setPercentBrigadier($parameters->percentBrigadier);
     $project->setColor($parameters->color);
     $project->setFinished(false);
     $em->persist($project);
     $em->flush();
     return $project;
 }