Added more stubbed mothods and providers

NzbDrone.Core/Providers/IEpisodeProvider.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using NzbDrone.Core.Repository;
+
+namespace NzbDrone.Core.Providers
+{
+    public interface IEpisodeProvider
+    {
+        Episode GetEpisode(long id);
+        Episode SaveEpisode(Episode episode);
+        IList<Episode> GetEpisodesBySeason(long seasonId);
+        IList<Episode> GetEpisodeBySeries(long seriesId);
+        String GetSabTitle(Episode episode);
+
+        /// <summary>
+        /// Comprehensive check on whether or not this episode is needed.
+        /// </summary>
+        /// <param name="episode">Episode that needs to be checked</param>
+        /// <returns></returns>
+        bool IsNeeded(Episode episode);
+    }
+}