MAGETWO-34878: PR and cleanup

app/code/Magento/Sales/Model/Order/Shipment/Item.php

@@ -15,6 +15,7 @@ use Magento\Sales\Api\Data\ShipmentItemInterface;
 /**
  * @method \Magento\Sales\Model\Resource\Order\Shipment\Item _getResource()
  * @method \Magento\Sales\Model\Resource\Order\Shipment\Item getResource()
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
 class Item extends AbstractExtensibleModel implements ShipmentItemInterface
 {

app/code/Magento/Sales/Test/Unit/Controller/Adminhtml/Order/Invoice/AddCommentTest.php

@@ -291,7 +291,7 @@ class AddCommentTest extends \PHPUnit_Framework_TestCase
     /**
      * Test execute exception
      *
-     *@return void
+     * @return void
      */
     public function testExecuteException()
     {