NO-JIRA Add missing header
diff --git a/test/Extensions/ExpectedExceptionAttribute.cs b/test/Extensions/ExpectedExceptionAttribute.cs
index 5959b17..5f296e4 100644
--- a/test/Extensions/ExpectedExceptionAttribute.cs
+++ b/test/Extensions/ExpectedExceptionAttribute.cs
@@ -1,4 +1,21 @@
-using System;
+/*
+ * 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.
+ */
+
+using System;
using NUnit.Framework;
using NUnit.Framework.Interfaces;
using NUnit.Framework.Internal;
