diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index 0d6cda6..40f6261 100644
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -175,6 +175,17 @@ final class ApiController extends Controller
         return $mediaCreated;
     }
 
+    /**
+     * Create db entry for uploaded file
+     *
+     * @param array  $status      Files
+     * @param int    $account     Uploader
+     * @param string $virtualPath Virtual path (not on the hard-drive)
+     *
+     * @return null|Media
+     *
+     * @since 1.0.0
+     */
     public static function createDbEntry(array $status, int $account, string $virtualPath = '/') : ?Media
     {
         $media = null;
@@ -195,6 +206,15 @@ final class ApiController extends Controller
         return $media;
     }
 
+    /**
+     * Normalize the file path
+     *
+     * @param string $path Path to the file
+     *
+     * @return string
+     *
+     * @since 1.0.0
+     */
     private static function normalizeDbPath(string $path) : string
     {
         $realpath = \realpath(__DIR__ . '/../../../');
diff --git a/Models/FileStorageInterface.php b/Models/FileStorageInterface.php
index 7b4d42a..4bb7c4b 100644
--- a/Models/FileStorageInterface.php
+++ b/Models/FileStorageInterface.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -9,4 +9,6 @@
  * @license   OMS License 1.0
  * @version   1.0.0
  * @link      https://orange-management.org
- */ // TODO: implement file storage interface
+ */
+declare(strict_types=1);
+ // TODO: implement file storage interface
diff --git a/Models/FileUploaderTrait.php b/Models/FileUploaderTrait.php
index 0dba65d..497aa0c 100644
--- a/Models/FileUploaderTrait.php
+++ b/Models/FileUploaderTrait.php
@@ -21,8 +21,10 @@ use phpOMS\Message\ResponseAbstract;
 /**
  * Options trait.
  *
- * @package    Modules\Media\Models
- * @since      1.0.0
+ * @package Modules\Media\Models
+ * @license OMS License 1.0
+ * @link    https://orange-management.org
+ * @since   1.0.0
  */
 trait FileUploaderTrait
 {
diff --git a/Models/FtpFileStorage.php b/Models/FtpFileStorage.php
index 376712b..cd4d0f2 100644
--- a/Models/FtpFileStorage.php
+++ b/Models/FtpFileStorage.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -9,4 +9,6 @@
  * @license   OMS License 1.0
  * @version   1.0.0
  * @link      https://orange-management.org
- */ // TODO: implement filestorage on remote ftp server
+ */
+declare(strict_types=1);
+ // TODO: implement filestorage on remote ftp server
diff --git a/Models/LocalFileStorage.php b/Models/LocalFileStorage.php
index c01c983..68c3ef7 100644
--- a/Models/LocalFileStorage.php
+++ b/Models/LocalFileStorage.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -9,4 +9,6 @@
  * @license   OMS License 1.0
  * @version   1.0.0
  * @link      https://orange-management.org
- */ // TODO: implement local file storage
+ */
+declare(strict_types=1);
+ // TODO: implement local file storage
diff --git a/Models/Media.php b/Models/Media.php
index d5e0dcf..e2bf5fd 100644
--- a/Models/Media.php
+++ b/Models/Media.php
@@ -111,7 +111,7 @@ class Media implements \JsonSerializable
      * @var   string
      * @since 1.0.0
      */
-    protected string $description    = '';
+    protected string $description = '';
 
     /**
      * Media Description.
@@ -149,11 +149,31 @@ class Media implements \JsonSerializable
         return $this->id;
     }
 
-    public function encrypt(string $password, string $outputPath) : void
+    /**
+     * Encrypt the media file
+     *
+     * @param string      $password   Password to encrypt the file with
+     * @param null|string $outputPath Output path of the encryption (null = replace file)
+     *
+     * @return void
+     *
+     * @since 1.0.0
+     */
+    public function encrypt(string $password, string $outputPath = null) : void
     {
         // todo: implement;
     }
 
+    /**
+     * Decrypt the media file
+     *
+     * @param string      $password   Password to encrypt the file with
+     * @param null|string $outputPath Output path of the encryption (null = replace file)
+     *
+     * @return void
+     *
+     * @since 1.0.0
+     */
     public function decrypt(string $password, string $outputPath) : string
     {
         // todo: implement;
diff --git a/Models/UploadFile.php b/Models/UploadFile.php
index f4b417c..749775f 100644
--- a/Models/UploadFile.php
+++ b/Models/UploadFile.php
@@ -179,6 +179,7 @@ class UploadFile
                 return $result;
             }
 
+            /*
             if ($this->isInterlaced && \in_array($extension, FileUtils::IMAGE_EXTENSION)) {
                 // todo: interlacing somehow messes up some images (tested with logo.png from assets)
                 //$this->interlace($extension, $dest);
@@ -187,7 +188,7 @@ class UploadFile
             if ($encoding !== '') {
                 // changing encoding bugs out image files
                 //FileUtils::changeFileEncoding($dest, $encoding);
-            }
+            }*/
 
             $result[$key]['path'] = \realpath($this->outputDir);
         }
diff --git a/Theme/Backend/Lang/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index e642abb..14b3dd8 100644
--- a/Theme/Backend/Lang/Navigation.en.lang.php
+++ b/Theme/Backend/Lang/Navigation.en.lang.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -10,6 +10,8 @@
  * @version   1.0.0
  * @link      https://orange-management.org
  */
+declare(strict_types=1);
+
 return ['Navigation' => [
     'Create' => 'Create',
     'List'   => 'List',
diff --git a/Theme/Backend/Lang/api.en.lang.php b/Theme/Backend/Lang/api.en.lang.php
index 9956082..34aac3a 100644
--- a/Theme/Backend/Lang/api.en.lang.php
+++ b/Theme/Backend/Lang/api.en.lang.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -10,6 +10,8 @@
  * @version   1.0.0
  * @link      https://orange-management.org
  */
+declare(strict_types=1);
+
 $MODLANG[1] = [
     'i:ModuleInstalled' => 'Installation of the module {$1} was successful.',
 ];
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index 3d53b37..1b4a34b 100644
--- a/Theme/Backend/Lang/en.lang.php
+++ b/Theme/Backend/Lang/en.lang.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -10,6 +10,8 @@
  * @version   1.0.0
  * @link      https://orange-management.org
  */
+declare(strict_types=1);
+
 return ['Media' => [
     'Account'     => 'Account',
     'Author'      => 'Author',
diff --git a/Theme/Backend/media-create.tpl.php b/Theme/Backend/media-create.tpl.php
index a44e059..85351da 100644
--- a/Theme/Backend/media-create.tpl.php
+++ b/Theme/Backend/media-create.tpl.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -10,6 +10,8 @@
  * @version   1.0.0
  * @link      https://orange-management.org
  */
+declare(strict_types=1);
+
 /**
  * @var \phpOMS\Views\View $this
  */
diff --git a/Theme/Backend/media-list.tpl.php b/Theme/Backend/media-list.tpl.php
index b095b27..65e05c2 100644
--- a/Theme/Backend/media-list.tpl.php
+++ b/Theme/Backend/media-list.tpl.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -10,6 +10,8 @@
  * @version   1.0.0
  * @link      https://orange-management.org
  */
+declare(strict_types=1);
+
 
 include __DIR__ . '/template-functions.php';
 
diff --git a/Theme/Backend/media-single.tpl.php b/Theme/Backend/media-single.tpl.php
index 3010ab4..77a6bff 100644
--- a/Theme/Backend/media-single.tpl.php
+++ b/Theme/Backend/media-single.tpl.php
@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 /**
  * Orange Management
  *
@@ -10,6 +10,8 @@
  * @version   1.0.0
  * @link      https://orange-management.org
  */
+declare(strict_types=1);
+
 
 use \phpOMS\System\File\FileUtils;
 use \phpOMS\System\File\Local\File;
diff --git a/Theme/Backend/template-functions.php b/Theme/Backend/template-functions.php
index c9f4cc2..d049556 100644
--- a/Theme/Backend/template-functions.php
+++ b/Theme/Backend/template-functions.php
@@ -1,4 +1,16 @@
-<?php declare(strict_types=1);
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @package   Modules\HumanResourceManagement\Models
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
 
 use \phpOMS\System\File\ExtensionType;
 
diff --git a/Views/MediaView.php b/Views/MediaView.php
index 97c4858..89f7d67 100644
--- a/Views/MediaView.php
+++ b/Views/MediaView.php
@@ -32,6 +32,16 @@ use phpOMS\Views\View;
  */
 class MediaView extends View
 {
+    /**
+     * Get file path
+     *
+     * @param Media  $media Media file
+     * @param string $sub   Sub path
+     *
+     * @return string
+     *
+     * @since 1.0.0
+     */
     protected function filePathFunction(Media $media, string $sub) : string
     {
         if (\is_file($media->getPath() . $sub)
@@ -46,6 +56,16 @@ class MediaView extends View
         return $media->getPath();
     }
 
+    /**
+     * Get directory path
+     *
+     * @param Media  $media Media file
+     * @param string $sub   Sub path
+     *
+     * @return string
+     *
+     * @since 1.0.0
+     */
     protected function dirPathFunction(Media $media, string $sub) : string
     {
         if (\is_dir($media->getPath() . $sub)
@@ -60,6 +80,16 @@ class MediaView extends View
         return $media->getPath();
     }
 
+    /**
+     * Check if media file is a collection
+     *
+     * @param Media  $media Media file
+     * @param string $sub   Sub path
+     *
+     * @return bool
+     *
+     * @since 1.0.0
+     */
     protected function isCollectionFunction(Media $media, string $sub) : bool
     {
         return ($media->getExtension() === 'collection'
@@ -69,6 +99,15 @@ class MediaView extends View
         );
     }
 
+    /**
+     * Get file content
+     *
+     * @param string $path File path
+     *
+     * @return string
+     *
+     * @since 1.0.0
+     */
     protected function getFileContent(string $path) : string
     {
         $output = \file_get_contents($path);
@@ -77,6 +116,15 @@ class MediaView extends View
         return $output;
     }
 
+    /**
+     * Get file content
+     *
+     * @param string $path File path
+     *
+     * @return array
+     *
+     * @since 1.0.0
+     */
     protected function lineContentFunction(string $path) : array
     {
         $output = \file_get_contents($path);
@@ -85,12 +133,32 @@ class MediaView extends View
         return \explode("\n", $output);
     }
 
+    /**
+     * Check if media file is image file
+     *
+     * @param Media  $media Media file
+     * @param string $path  File path
+     *
+     * @return bool
+     *
+     * @since 1.0.0
+     */
     protected function isImageFile(Media $media, string $path) : bool
     {
         return FileUtils::getExtensionType($media->getExtension()) === ExtensionType::IMAGE
             || FileUtils::getExtensionType(File::extension($path)) === ExtensionType::IMAGE;
     }
 
+    /**
+     * Check if media file is text file
+     *
+     * @param Media  $media Media file
+     * @param string $path  File path
+     *
+     * @return bool
+     *
+     * @since 1.0.0
+     */
     protected function isTextFile(Media $media, string $path) : bool
     {
         $mediaExtension = FileUtils::getExtensionType($media->getExtension());