diff --git a/src/Bootstrap.php b/src/Bootstrap.php
index 8a051db..7cdb688 100644
--- a/src/Bootstrap.php
+++ b/src/Bootstrap.php
@@ -210,6 +210,9 @@ class Bootstrap
         }
     }
 
+    /**
+     * Runs the code to extend models.
+     */
     public function extendModels()
     {
         AnnotationRegistry::registerLoader("class_exists");
diff --git a/src/Doctrine/EntityPostLoadEventListener.php b/src/Doctrine/EntityPostLoadEventListener.php
index 35e0e4f..f86bef3 100644
--- a/src/Doctrine/EntityPostLoadEventListener.php
+++ b/src/Doctrine/EntityPostLoadEventListener.php
@@ -17,11 +17,19 @@ class EntityPostLoadEventListener
     /** @var Game $game */
     private $game;
 
+    /**
+     * EntityPostLoadEventListener constructor.
+     * @param Game $g
+     */
     public function __construct(Game $g)
     {
         $this->game = $g;
     }
 
+    /**
+     * Called upon event postLoad.
+     * @param LifecycleEventArgs $args
+     */
     public function postLoad(LifecycleEventArgs $args)
     {
         $entity = $args->getEntity();
diff --git a/src/LibraryConfiguration.php b/src/LibraryConfiguration.php
index 7ff32ed..8a42702 100644
--- a/src/LibraryConfiguration.php
+++ b/src/LibraryConfiguration.php
@@ -124,7 +124,7 @@ class LibraryConfiguration
     /**
      * Returns a subkey if it exists or null.
      * @param array $arguments
-     * @return type
+     * @return mixed
      */
     public function getSubKeyIfItExists(array $arguments)
     {
diff --git a/src/ModelExtender.php b/src/ModelExtender.php
index 35a1f34..9415b5e 100644
--- a/src/ModelExtender.php
+++ b/src/ModelExtender.php
@@ -10,11 +10,20 @@ use ReflectionClass;
 use Doctrine\Common\Annotations\AnnotationReader;
 use LotGD\Core\Doctrine\Annotations\Extension;
 
+/**
+ * Contains method to help the extension of a model.
+ * @package LotGD\Core
+ */
 class ModelExtender
 {
+    /** @var AnnotationReader */
     private $reader;
+    /** @var array */
     private static $classes = [];
 
+    /**
+     * ModelExtender constructor.
+     */
     public function __construct()
     {
         $this->reader = new AnnotationReader();
@@ -65,6 +74,12 @@ class ModelExtender
         }
     }
 
+    /**
+     * Returns a callback registered in the model extender globally.
+     * @param string $modelClassName
+     * @param string $methodName
+     * @return callable|null
+     */
     public static function get(string $modelClassName, string $methodName): ?callable
     {
         if (empty(self::$classes[$modelClassName])) {
diff --git a/src/Tools/Model/ExtendableModel.php b/src/Tools/Model/ExtendableModel.php
index ad793d4..c7cabda 100644
--- a/src/Tools/Model/ExtendableModel.php
+++ b/src/Tools/Model/ExtendableModel.php
@@ -5,6 +5,10 @@ namespace LotGD\Core\Tools\Model;
 
 use LotGD\Core\ModelExtender;
 
+/**
+ * Trait to add the __call class required for extendable models.
+ * @package LotGD\Core\Tools\Model
+ */
 trait ExtendableModel
 {
     public function __call($method, $arguments)