added javadoc

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<[email protected]> - 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);
 }