How do I have to add a Manufacturers in Magento

How do I have to add the Manufacturers Attribute in Magento usin开发者_开发百科g php?

Thanks

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private function addManufacturers($manufacturer){

        //add new manufacturer
        $option['attribute_id'] = 70; //manufacturer
        $option['value']['any_key_that_resolves_to_zero'][0] = $manufacturer;

        $setup = new Mage_Eav_Model_Entity_Setup('core_setup');
        $setup->addAttributeOption($option);
        return $this->getManufacturerId($manufacturer);

}