public function execute()
{
/**
* When Magento get your model, it will generate a Factory class
* for your model at var/generaton folder and we can get your
* model by this way
*/
$newsModel = $this->_modelManufacturerFactory->create();
$newsCollection = $newsModel->getCollection();
var_dump($newsCollection->getData());
}
/**
* Set news collection
*/
protected function _construct()
{
parent::_construct();
$collection = $this->_newsFactory->create()->getCollection()->setOrder('id', 'DESC');
$this->setCollection($collection);
}