Dav: add some documentation on classes

src/Bundle/ChillDocStoreBundle/Security/Authorization/StoredObjectVoter.php

@@ -16,6 +16,11 @@ use Chill\DocStoreBundle\Security\Guard\DavTokenAuthenticationEventSubscriber;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
 use Symfony\Component\Security\Core\Authorization\Voter\Voter;
 
+/**
+ * Voter for the content of a stored object.
+ *
+ * This is in use to allow or disallow the edition of the stored object's content.
+ */
 class StoredObjectVoter extends Voter
 {
     protected function supports($attribute, $subject): bool