protected function _beforeSave()
 {
     if ($this->getData('moneybooker_email')) {
         $this->setData('email', $this->getData('moneybooker_email'));
     }
     if ($this->getData('moneybooker_transaction_id')) {
         $this->setData('transaction_id', $this->getData('moneybooker_transaction_id'));
     }
     return parent::_beforeSave();
 }