Individual exception for one controller

May be anybody knows how to disable Yii exception and use my personal exception just in one controller

try {

$model= Aricle::model();

if (!$Article) {

throw new Exception("Could not open the file!");

}

} catch (Exception $e){

$row=$e->getMessage();

}

here i just want to set up var, nothing more, no html ,nothing

Yii always start his exception in both modes,debug and product