added javadoc
diff --git a/bundles/runtime/org.eclipse.fx.core/src/org/eclipse/fx/core/function/BiIntUnaryOperator.java b/bundles/runtime/org.eclipse.fx.core/src/org/eclipse/fx/core/function/BiIntUnaryOperator.java
index 9b4f510..ff11819 100644
--- a/bundles/runtime/org.eclipse.fx.core/src/org/eclipse/fx/core/function/BiIntUnaryOperator.java
+++ b/bundles/runtime/org.eclipse.fx.core/src/org/eclipse/fx/core/function/BiIntUnaryOperator.java
@@ -1,5 +1,31 @@
+/*******************************************************************************
+ * Copyright (c) 2017 BestSolution.at and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation
+ *******************************************************************************/
package org.eclipse.fx.core.function;
+import java.util.function.IntUnaryOperator;
+
+/**
+ * Like {@link IntUnaryOperator} but with 2 arguments
+ *
+ * @since 3.0
+ */
public interface BiIntUnaryOperator {
+ /**
+ * Applies this operator to the given operands.
+ *
+ * @param t
+ * the first operand
+ * @param u
+ * the second operand
+ * @return the operator result
+ */
public int applyAsInt(int t, int u);
}
