Moved Mage.Common classes from src to src/main/java

Mage.Common/src/main/java/mage/utils/ActionWithBooleanResult.java

@@ -0,0 +1,15 @@
+package mage.utils;
+
+import mage.interfaces.ActionWithResult;
+
+/**
+ * Used to write less code for ActionWithResult anonymous classes with Boolean return type.
+ *
+ * @author noxx
+ */
+public abstract class ActionWithBooleanResult implements ActionWithResult<Boolean> {
+    @Override
+    public Boolean negativeResult() {
+        return false;
+    }
+}