added mediator sample

mediator/src/main/java/com/iluwatar/Action.java

@@ -0,0 +1,28 @@
+package com.iluwatar;
+
+public enum Action {
+
+	HUNT, TALE, GOLD, ENEMY;
+
+	public String toString() {
+		
+		String s = "";
+		switch (this) {
+		case ENEMY:
+			s = "spotted enemies";
+			break;
+		case GOLD:
+			s = "found gold";
+			break;
+		case HUNT:
+			s = "hunted a rabbit";
+			break;
+		case TALE:
+			s = "tells a tale";
+			break;
+		default:
+			break;
+		}
+		return s;
+	};
+}