Add missing license header
git-svn-id: https://svn.apache.org/repos/asf/commons/proper/functor/trunk@1541567 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/core/src/main/java/org/apache/commons/functor/range/AbstractRange.java b/core/src/main/java/org/apache/commons/functor/range/AbstractRange.java
index 52c1695..3e335ca 100644
--- a/core/src/main/java/org/apache/commons/functor/range/AbstractRange.java
+++ b/core/src/main/java/org/apache/commons/functor/range/AbstractRange.java
@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
package org.apache.commons.functor.range;
import java.util.Collection;
