/**
  * Initialize product before saving
  */
 protected function _initProductSave()
 {
     /**
      * Init maintainer links
      */
     $links = $this->getRequest()->getPost('links');
     $product = parent::_initProductSave();
     if (isset($links['maintainer'])) {
         $maintainerIds = $this->_decodeInput($links['maintainer']);
         $product->setMaintainerIds($maintainerIds);
     }
     return $product;
 }