Add OvenException for oven related internal exceptions

src/main/java/org/drtshock/OvenException.java

@@ -0,0 +1,12 @@
+package org.drtshock;
+
+/**
+ * Created by Joe Hirschfeld on 10/2/2015.
+ */
+public class OvenException extends Exception {
+
+    public OvenException(Exception internalException){
+        super(internalException);
+    }
+
+}