Male NoFail use an applicable interface

osu.Game/Rulesets/Mods/IApplicableFailOverride.cs

@@ -0,0 +1,16 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+namespace osu.Game.Rulesets.Mods
+{
+    /// <summary>
+    /// Represents a mod which can override (and block) a fail.
+    /// </summary>
+    public interface IApplicableFailOverride : IApplicableMod
+    {
+        /// <summary>
+        /// Whether we should allow failing at the current point in time.
+        /// </summary>
+        bool AllowFail { get; }
+    }
+}