public function addScraper(ScraperBean $scraper)
 {
     $scrapers = $this->getScrapers();
     $id = 0;
     foreach ($scrapers as $key => $value) {
         if ($key > $id) {
             $id = $key;
         }
     }
     ++$id;
     $scraper->setId($id);
     $scrapers[$id] = $scraper;
     $this->saveScrapers($scrapers);
 }