Add some documenation

app/src/Domain/Repository/Episode/EpisodeFileRepositoryInterface.php

@@ -6,6 +6,11 @@ use Slovocast\Domain\Entity\Episode;
 use Slovocast\Domain\Entity\Episode\File;
 use Slovocast\Domain\RepositoryInterface;
 
+/**
+ * The Episode File repository should consist of getting and setting the data
+ * about the file stored in the database. The implementation of this class
+ * should concern itself with the data _about_ the file, not the file itself.
+ */
 interface EpisodeFileRepositoryInterface extends RepositoryInterface
 {
     public function get(string $location): File;