[ticket/16955] Fix most return types in phpdoc

PHPBB3-16955

phpBB/includes/acp/acp_attachments.php

@@ -1349,7 +1349,7 @@ class acp_attachments
 	* Set config attachment stat values
 	*
 	* @param $stats array	Array of config key => value pairs to set.
-	* @return null
+	* @return void
 	*/
 	public function set_attachment_stats($stats)
 	{
@@ -1392,7 +1392,7 @@ class acp_attachments
 	/**
 	* Handle stats resync.
 	*
-	* @return null
+	* @return void
 	*/
 	public function handle_stats_resync()
 	{

phpBB/includes/acp/acp_extensions.php

@@ -767,7 +767,7 @@ class acp_extensions
 	 * @param \phpbb\extension\manager  $phpbb_extension_manager     An instance of the extension manager
 	 * @param array                     $managed_packages            List of managed packages
 	 *
-	 * @return null
+	 * @return void
 	 */
 	public function list_enabled_exts(\phpbb\extension\manager $phpbb_extension_manager, array $managed_packages)
 	{
@@ -850,7 +850,7 @@ class acp_extensions
 	 * @param \phpbb\extension\manager  $phpbb_extension_manager     An instance of the extension manager
 	 * @param array                     $managed_packages            List of managed packages
 	 *
-	 * @return null
+	 * @return void
 	 */
 	public function list_disabled_exts(\phpbb\extension\manager $phpbb_extension_manager, array $managed_packages)
 	{
@@ -930,7 +930,7 @@ class acp_extensions
 	 *
 	 * @param array                     $managed_packages            List of managed packages
 	 *
-	 * @return null
+	 * @return void
 	 */
 	public function list_available_exts(array $managed_packages)
 	{
@@ -1026,7 +1026,7 @@ class acp_extensions
 	* Outputs extension metadata into the template
 	*
 	* @param array $metadata Array with all metadata for the extension
-	* @return null
+	* @return void
 	*/
 	public function output_metadata_to_template($metadata)
 	{

phpBB/includes/acp/acp_language.php

@@ -224,7 +224,7 @@ class acp_language
 					}
 					catch (\Exception $e)
 					{
-						return array();
+						return;
 					}
 
 					foreach ($iterator as $file_info)

phpBB/includes/acp/acp_storage.php

@@ -356,8 +356,8 @@ class acp_storage
 	 *
 	 * @param string $storage_name Storage name
 	 * @param array $options Storage provider configuration keys
-	 * @param array $messages Error messages array
-	 * @return array $messages Reference to messages array
+	 * @param array $messages Reference to error messages array
+	 * @return void
 	 */
 	protected function validate_path($storage_name, $options, &$messages)
 	{