added phpdoc

src/Symfony/Component/HttpKernel/EventListener/RouterListener.php

@@ -36,12 +36,19 @@ class RouterListener implements EventSubscriberInterface
     private $context;
     private $logger;
 
+    /**
+     * Constructor.
+     *
+     * @param UrlMatcherInterface|RequestMatcherInterface $matcher The Url or Request matcher
+     * @param RequestContext|null                         $context The RequestContext (can be null when $matcher implements RequestContextAwareInterface)
+     * @param LoggerInterface|null                        $logger  The logger
+     */
     public function __construct($matcher, RequestContext $context = null, LoggerInterface $logger = null)
     {
         if (!$matcher instanceof UrlMatcherInterface && !$matcher instanceof RequestMatcherInterface) {
             throw new \InvalidArgumentException('Matcher must either implement UrlMatcherInterface or RequestMatcherInterface.');
         }
-        
+
         if (null === $context && !$matcher instanceof RequestContextAwareInterface) {
             throw new \InvalidArgumentException('You must either pass a RequestContext or the matcher must implement RequestContextAwareInterface.');
         }