Fixing returning types

app/code/Magento/Backend/Block/Template/Context.php

@@ -173,6 +173,8 @@ public function getAuthorization()
     }
 
     /**
+     * Get Backend Session
+     *
      * @return \Magento\Backend\Model\Session
      */
     public function getBackendSession()
@@ -181,6 +183,8 @@ public function getBackendSession()
     }
 
     /**
+     * Get Math Random
+     *
      * @return \Magento\Framework\Math\Random
      */
     public function getMathRandom()
@@ -189,6 +193,8 @@ public function getMathRandom()
     }
 
     /**
+     * Get Form Key
+     *
      * @return \Magento\Framework\Data\Form\FormKey
      */
     public function getFormKey()
@@ -197,7 +203,9 @@ public function getFormKey()
     }
 
     /**
-     * @return \Magento\Framework\Data\Form\FormKey
+     * Get Class Name Builder
+     *
+     * @return \Magento\Framework\Code\NameBuilder
      */
     public function getNameBuilder()
     {

app/code/Magento/Backup/Model/Backup.php

@@ -80,6 +80,7 @@ class Backup extends \Magento\Framework\DataObject implements \Magento\Framework
      * @param \Magento\Framework\Encryption\EncryptorInterface $encryptor
      * @param \Magento\Framework\Filesystem $filesystem
      * @param array $data
+     * @throws \Magento\Framework\Exception\FileSystemException
      */
     public function __construct(
         \Magento\Backup\Helper\Data $helper,
@@ -242,7 +243,7 @@ public function setFile(&$content)
     /**
      * Return content of backup file
      *
-     * @return string
+     * @return array
      * @throws \Magento\Framework\Exception\LocalizedException
      */
     public function &getFile()
@@ -275,8 +276,9 @@ public function deleteFile()
      *
      * @param bool $write
      * @return $this
-     * @throws \Magento\Framework\Exception\InputException
      * @throws \Magento\Framework\Backup\Exception\NotEnoughPermissions
+     * @throws \Magento\Framework\Exception\FileSystemException
+     * @throws \Magento\Framework\Exception\InputException
      */
     public function open($write = false)
     {
@@ -330,6 +332,7 @@ protected function _getStream()
      *
      * @param int $length
      * @return string
+     * @throws \Magento\Framework\Exception\InputException
      */
     public function read($length)
     {
@@ -340,6 +343,7 @@ public function read($length)
      * Check end of file.
      *
      * @return bool
+     * @throws \Magento\Framework\Exception\InputException
      */
     public function eof()
     {
@@ -370,6 +374,7 @@ public function write($string)
      * Close open backup file
      *
      * @return $this
+     * @throws \Magento\Framework\Exception\InputException
      */
     public function close()
     {
@@ -383,6 +388,8 @@ public function close()
      * Print output
      *
      * @return string
+     * @return \Magento\Framework\Filesystem\Directory\ReadInterface|string|void
+     * @throws \Magento\Framework\Exception\FileSystemException
      */
     public function output()
     {
@@ -398,6 +405,8 @@ public function output()
     }
 
     /**
+     * Get Size
+     *
      * @return int|mixed
      */
     public function getSize()
@@ -419,6 +428,7 @@ public function getSize()
      *
      * @param string $password
      * @return bool
+     * @throws \Exception
      */
     public function validateUserPassword($password)
     {

app/code/Magento/Ui/Component/Wysiwyg/Config.php

@@ -13,7 +13,7 @@ class Config implements ConfigInterface
     /**
      * Return WYSIWYG configuration
      *
-     * @return \Magento\Framework\DataObject
+     * @return array
      */
     public function getConfig()
     {

app/code/Magento/Widget/Block/Adminhtml/Widget/Catalog/Category/Chooser.php

@@ -3,22 +3,19 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+namespace Magento\Widget\Block\Adminhtml\Widget\Catalog\Category;
 
 /**
  * Category chooser for widget's layout updates
- *
- * @author     Magento Core Team <core@magentocommerce.com>
  */
-namespace Magento\Widget\Block\Adminhtml\Widget\Catalog\Category;
-
 class Chooser extends \Magento\Catalog\Block\Adminhtml\Category\Widget\Chooser
 {
     /**
      * Get JSON of a tree node or an associative array
      *
      * @param \Magento\Framework\Data\Tree\Node|array $node
      * @param int $level
-     * @return string
+     * @return array
      */
     protected function _getNodeJson($node, $level = 0)
     {