diff --git a/Form/DataTransformer/ModelsToArrayTransformer.php b/Form/DataTransformer/ModelsToArrayTransformer.php
index 28fa77e..c72539c 100644
--- a/Form/DataTransformer/ModelsToArrayTransformer.php
+++ b/Form/DataTransformer/ModelsToArrayTransformer.php
@@ -10,17 +10,30 @@
 
 namespace Propel\PropelBundle\Form\DataTransformer;
 
-use Symfony\Component\Form\DataTransformerInterface;
 use Symfony\Component\Form\Exception\UnexpectedTypeException;
 use Symfony\Component\Form\Exception\TransformationFailedException;
-use Propel\PropelBundle\Form\ChoiceList\ModelChoiceList;
+use Symfony\Component\Form\DataTransformerInterface;
+
 use \PropelCollection;
 use \PropelObjectCollection;
+use Propel\PropelBundle\Form\ChoiceList\ModelChoiceList;
 
+/**
+ * ModelsToArrayTransformer class.
+ *
+ * @author William Durand <william.durand1@gmail.com>
+ * @author Pierre-Yves Lebecq <py.lebecq@gmail.com>
+ */
 class ModelsToArrayTransformer implements DataTransformerInterface
 {
+    /**
+     * @var \Propel\PropelBundle\Form\ChoiceList\ModelChoiceList
+     */
     private $choiceList;
 
+    /**
+     * @param \Propel\PropelBundle\Form\ChoiceList\ModelChoiceList $choiceList
+     */
     public function __construct(ModelChoiceList $choiceList)
     {
         $this->choiceList = $choiceList;
@@ -32,7 +45,7 @@ class ModelsToArrayTransformer implements DataTransformerInterface
             return array();
         }
 
-        if (!($collection instanceof PropelCollection)) {
+        if (!$collection instanceof PropelCollection) {
             throw new UnexpectedTypeException($collection, '\PropelCollection');
         }