diff --git a/Account/AccountManager.php b/Account/AccountManager.php
index 7c25d8b9b..8457c5e02 100644
--- a/Account/AccountManager.php
+++ b/Account/AccountManager.php
@@ -94,6 +94,13 @@ class AccountManager implements \Countable
         return $this->accounts[$id] ?? new NullAccount();
     }
 
+    /**
+     * Returns the authentication manager
+     *
+     * @return Auth
+     *
+     * @since  1.0.0
+     */
     public function getAuth() : Auth
     {
         return $this->auth;
diff --git a/Business/Sales/MarketShareEstimation.php b/Business/Sales/MarketShareEstimation.php
index 2e8eef0d9..b2b03079a 100644
--- a/Business/Sales/MarketShareEstimation.php
+++ b/Business/Sales/MarketShareEstimation.php
@@ -33,11 +33,11 @@ class MarketShareEstimation {
      *
      * @latex  r = \sqrt[s]{\frac{1}{m \times \sum_{n=1}^N{\frac{1}{n^{s}}}}}
      *
-     * @param int $participants (N)
-     * @param float $marketShare (m)
-     * @param float $modifier (s)
+     * @param int $participants The amount of existing participants in the market or compentitors (N)
+     * @param float $marketShare The absolute own market share (m)
+     * @param float $modifier Distribution modifier (s)
      *
-     * @return int
+     * @return int Returns the rank
      *
      * @since  1.0.0
      */
@@ -56,11 +56,11 @@ class MarketShareEstimation {
      *
      * @latex  m = \frac{\frac{1}{r^{s}}}{\sum_{n=1}^N{\frac{1}{n^{s}}}}
      *
-     * @param int $participants (N)
-     * @param int $rank (r)
-     * @param float $modifier (s)
+     * @param int $participants The amount of existing participants in the market or compentitors (N)
+     * @param int $rank The absolute own rank in the market (r)
+     * @param float $modifier Distribution modifier (s)
      *
-     * @return float
+     * @return float Returns the Market share
      *
      * @since  1.0.0
      */
diff --git a/Module/PackageManager.php b/Module/PackageManager.php
index 5e8117233..d743e1fcf 100644
--- a/Module/PackageManager.php
+++ b/Module/PackageManager.php
@@ -23,7 +23,9 @@ use phpOMS\System\File\Local\LocalStorage;
 use phpOMS\Utils\IO\Zip\Zip;
 
 /**
- * Account group class.
+ * Package Manager model.
+ * 
+ * The package manager is responsible for handling installation and update packages for modules, frameworks and resources.
  *
  * @category   Framework
  * @package    phpOMS\Account
@@ -66,10 +68,10 @@ class PackageManager
     private $info = [];
 
     /**
-     * Object constructor.
-     *
-     * @param string $path Package path
-     * @param string $basePath Base Path of the application
+     * Constructor.
+     * 
+     * @param string $path Package source path e.g. path after download.
+     * @param string basePath Path of the application
      *
      * @since  1.0.0
      */
@@ -79,6 +81,15 @@ class PackageManager
         $this->basePath = $basePath;
     }
 
+    /**
+     * Extract package to temporary destination
+     * 
+     * @param string $path Temporary extract path
+     * 
+     * @return bool
+     *
+     * @since  1.0.0
+     */
     public function extract(string $path) : bool
     {
         $this->extractPath = $path;
@@ -103,11 +114,27 @@ class PackageManager
         $this->info = json_decode(file_get_contents($this->extractPath . '/info.json'), true);
     }
 
+    /**
+     * Validate package integrity
+     * 
+     * @return bool Returns true if the package is authentic, false otherwise
+     *
+     * @since  1.0.0
+     */
     public function isValid() : bool
     {
         return $this->authenticate(file_get_contents($this->extractPath . '/package.cert'), $this->hashFiles());
     }
 
+    /**
+     * Hash array of files
+     * 
+     * @param array $files Files to hash
+     * 
+     * @return string Hash value of files
+     *
+     * @since  1.0.0
+     */
     private function hashFiles(array $files) : string
     {
         $files = Directory::list($this->extractPath . '/package');
@@ -124,6 +151,13 @@ class PackageManager
         return \sodium_crypto_generichash_final();
     }
 
+    /**
+     * Install package
+     * 
+     * @return void
+     *
+     * @since  1.0.0
+     */
     public function install() /* : void */
     {
         if(!$this->isValid()) {
@@ -137,6 +171,13 @@ class PackageManager
         }
     }
 
+    /**
+     * Move files
+     * 
+     * @return void
+     *
+     * @since  1.0.0
+     */
     private function move($components)
     {
         foreach($components as $component) {
@@ -144,6 +185,13 @@ class PackageManager
         }
     }
 
+    /**
+     * Copy files
+     * 
+     * @return void
+     *
+     * @since  1.0.0
+     */
     private function copy($components)
     {
         foreach($components as $component) {
@@ -155,6 +203,13 @@ class PackageManager
         }
     }
 
+    /**
+     * Delete files
+     * 
+     * @return void
+     *
+     * @since  1.0.0
+     */
     private function delete($components)
     {
         foreach($components as $component) {
@@ -162,6 +217,13 @@ class PackageManager
         }
     }
 
+    /**
+     * Execute commands
+     * 
+     * @return void
+     *
+     * @since  1.0.0
+     */
     private function execute($components) 
     {
         foreach($components as $component) {
@@ -169,13 +231,27 @@ class PackageManager
         }
     }
 
+    /**
+     * Cleanup after installation
+     * 
+     * @return void
+     *
+     * @since  1.0.0
+     */
     public function cleanup() 
     {
         File::delete($this->path);
         Directory::delete($this->extractPath);
     }
 
-    private function authenticate(string $signedHash, string $rawHash)
+    /**
+     * Authenticate package
+     * 
+     * @return bool
+     *
+     * @since  1.0.0
+     */
+    private function authenticate(string $signedHash, string $rawHash) : bool
     {
         // https://3v4l.org/PN9Xl
         $publicKey = 'MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAjr73rerPRq3ZwWmrUKsN
diff --git a/Utils/StringCompare.php b/Utils/StringCompare.php
index 0cf24641d..4d471d751 100644
--- a/Utils/StringCompare.php
+++ b/Utils/StringCompare.php
@@ -48,6 +48,15 @@ class StringCompare
         $this->dictionary = $dictionary;
     }
 
+    /**
+     * Adds word to dictionary
+     * 
+     * @param string $word Word to add to dictionary
+     * 
+     * @return void
+     *
+     * @since  1.0.0
+     */
     public function add(string $word) /* : void */
     {
         $this->dictionary[] = $word;