diff --git a/lib/preview/images.php b/lib/preview/images.php
index 933d65ec59ee3af44acf42c98b31a1630cfb2e7c..080e424e5bd0be58a13e5fb79bdeb63341a152f9 100644
--- a/lib/preview/images.php
+++ b/lib/preview/images.php
@@ -8,7 +8,7 @@
  */
 namespace OC\Preview;
 
-class Image extends Provider{
+class Image extends Provider {
 
 	public function getMimeType() {
 		return '/image\/.*/';
diff --git a/lib/preview/movies.php b/lib/preview/movies.php
index aa97c3f43fce17387ab11725f7d7a70cdd2b13a5..18e9d4f778c429208432bf112306933225079325 100644
--- a/lib/preview/movies.php
+++ b/lib/preview/movies.php
@@ -9,7 +9,8 @@
 namespace OC\Preview;
 
 if(!is_null(shell_exec('ffmpeg -version'))) {
-	class Movie extends Provider{
+
+	class Movie extends Provider {
 
 		public function getMimeType() {
 			return '/video\/.*/';
diff --git a/lib/preview/mp3.php b/lib/preview/mp3.php
index cfe78f32727bac78243e7b4bebe4761b73e223f0..303626e022edd83b11030ab121ec7aa257b9ab22 100644
--- a/lib/preview/mp3.php
+++ b/lib/preview/mp3.php
@@ -1,4 +1,4 @@
-<?php
+Provider{<?php
 /**
  * Copyright (c) 2013 Georg Ehrke georg@ownCloud.com
  * This file is licensed under the Affero General Public License version 3 or
@@ -9,7 +9,7 @@ namespace OC\Preview;
 
 require_once('getid3/getid3.php');
 
-class MP3 extends Provider{
+class MP3 extends Provider {
 
 	public function getMimeType() {
 		return '/audio\/mpeg/';
diff --git a/lib/preview/pdf.php b/lib/preview/pdf.php
index 66570b05aa46dc037d8f168b85a3b734805c2c00..85878a122a8dab6eb6def8cbe5f3bc0910f49d86 100644
--- a/lib/preview/pdf.php
+++ b/lib/preview/pdf.php
@@ -9,7 +9,7 @@ namespace OC\Preview;
 
 if (extension_loaded('imagick')) {
 
-	class PDF extends Provider{
+	class PDF extends Provider {
 
 		public function getMimeType() {
 			return '/application\/pdf/';
diff --git a/lib/preview/provider.php b/lib/preview/provider.php
index 58e7ad7f453436145cfbe0fe6828276ae9554cdf..44e1d11ba06b94edf00a1bfef0877d57f177d303 100644
--- a/lib/preview/provider.php
+++ b/lib/preview/provider.php
@@ -4,7 +4,7 @@
  */
 namespace OC\Preview;
 
-abstract class Provider{
+abstract class Provider {
 	private $options;
 
 	public function __construct($options) {
diff --git a/lib/preview/svg.php b/lib/preview/svg.php
index 746315d6e6a07b5bb37c7682a16116cf495a8fe7..8bceeaf60d155a17ae87b321692fb4f62239fc01 100644
--- a/lib/preview/svg.php
+++ b/lib/preview/svg.php
@@ -9,7 +9,7 @@ namespace OC\Preview;
 
 if (extension_loaded('imagick')) {
 
-	class SVG extends Provider{
+	class SVG extends Provider {
 
 		public function getMimeType() {
 			return '/image\/svg\+xml/';
diff --git a/lib/preview/txt.php b/lib/preview/txt.php
index def6806860bada29c331cf26f57abc1bd4600784..4eb0e820406f17f36a347c1ce67b18f40f8abf7f 100644
--- a/lib/preview/txt.php
+++ b/lib/preview/txt.php
@@ -7,7 +7,7 @@
  */
 namespace OC\Preview;
 
-class TXT extends Provider{
+class TXT extends Provider {
 
 	public function getMimeType() {
 		return '/text\/.*/';
diff --git a/lib/preview/unknown.php b/lib/preview/unknown.php
index 2977cd689230e4abe470cf7c036a21426a8f1c8b..6b161424917e2f33ff98d5f3d97ff19805919054 100644
--- a/lib/preview/unknown.php
+++ b/lib/preview/unknown.php
@@ -8,7 +8,7 @@
  */
 namespace OC\Preview;
 
-class Unknown extends Provider{
+class Unknown extends Provider {
 
 	public function getMimeType() {
 		return '/.*/';