3 files changed, 8 insertions, 4 deletions
diff --git a/lib/Fetcher/FeedFetcher.php b/lib/Fetcher/FeedFetcher.php
index 99d3d90ab..4e93424ba 100755
--- a/lib/Fetcher/FeedFetcher.php
+++ b/lib/Fetcher/FeedFetcher.php
@@ -64,7 +64,7 @@ class FeedFetcher implements IFeedFetcher
      *
      * @return bool
      */
-    public function canHandle($url): bool
+    public function canHandle(string $url): bool
     {
         return true;
     }
diff --git a/lib/Fetcher/IFeedFetcher.php b/lib/Fetcher/IFeedFetcher.php
index 6500c2690..ce44ec104 100644
--- a/lib/Fetcher/IFeedFetcher.php
+++ b/lib/Fetcher/IFeedFetcher.php
@@ -43,5 +43,5 @@ interface IFeedFetcher
      * @return boolean if the fetcher can handle the url. This fetcher will be
      * used exclusively to fetch the feed and the items of the page
      */
-    public function canHandle($url): bool;
+    public function canHandle(string $url): bool;
 }
diff --git a/lib/Fetcher/YoutubeFetcher.php b/lib/Fetcher/YoutubeFetcher.php
index 56adaae03..85aad5d59 100644
--- a/lib/Fetcher/YoutubeFetcher.php
+++ b/lib/Fetcher/YoutubeFetcher.php
@@ -37,9 +37,13 @@ class YoutubeFetcher implements IFeedFetcher
 
 
     /**
-     * This fetcher handles all the remaining urls therefore always returns true
+     * Check if the URL is a youtube URL by reformatting it.
+     *
+     * @param string $url the url that should be fetched
+     *
+     * @return bool
      */
-    public function canHandle($url): bool
+    public function canHandle(string $url): bool
     {
         return $this->buildUrl($url) !== $url;
     }