/**
  * @param Product $product
  */
 private function saveDownloads($product)
 {
     if ($product->isDownloadsModified()) {
         $this->getDb()->query("DELETE FROM product_to_download WHERE product_id = '" . (int) $product->getId() . "'");
         foreach ($product->getDownloads() as $download_id) {
             $this->getDb()->query("INSERT INTO product_to_download SET product_id = '" . (int) $product->getId() . "', download_id = '" . (int) $download_id . "'");
         }
     }
 }