fixed static tests

Author: akaplya

app/code/Magento/Catalog/Model/ResourceModel/Product/Gallery.php

@@ -39,7 +39,7 @@ class Gallery extends \Magento\Framework\Model\ResourceModel\Db\AbstractDb
      *
      * @param \Magento\Framework\Model\ResourceModel\Db\Context $context
      * @param \Magento\Framework\EntityManager\MetadataPool $metadataPool
-     * @param null $connectionName
+     * @param string $connectionName
      * @throws \Exception
      */
     public function __construct(

lib/internal/Magento/Framework/Storage/FileNotFoundException.php

@@ -9,9 +9,9 @@
 
 /**
  * Exception: FileNotFoundException
+ *
  * Exception to be thrown when the a requested file does not exists
  */
 class FileNotFoundException extends \RuntimeException
 {
-
 }

lib/internal/Magento/Framework/Storage/RootViolationException.php

@@ -9,9 +9,9 @@
 
 /**
  * Exception: RootViolationException
+ *
  * Exception to be thrown when the a directory root not specified
  */
 class RootViolationException extends \RuntimeException
 {
-
 }