diff --git a/pom.xml b/pom.xml
index e56f514..87921cb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -185,6 +185,28 @@
           </excludes>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.apache.rat</groupId>
+        <artifactId>apache-rat-plugin</artifactId>
+        <configuration>
+          <excludes>
+            <exclude>src/test/resources*/**</exclude>
+            <exclude>src/test/projects/**</exclude>
+            <exclude>src/test/remote-repo/**</exclude>             
+            <exclude>**/*.odg</exclude>
+            <exclude>**/download.cgi</exclude>
+            <exclude>src/it/*/*.txt</exclude>
+          </excludes>            
+        </configuration>
+        <executions>
+          <execution>
+            <id>check</id>
+            <goals>
+              <goal>check</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>      
     </plugins>
   </build>
 
diff --git a/src/it/multi-module-plugin/src/main/java/org/apache/maven/its/deptree/DummyMojo.java b/src/it/multi-module-plugin/src/main/java/org/apache/maven/its/deptree/DummyMojo.java
index c770d2f..6398291 100644
--- a/src/it/multi-module-plugin/src/main/java/org/apache/maven/its/deptree/DummyMojo.java
+++ b/src/it/multi-module-plugin/src/main/java/org/apache/maven/its/deptree/DummyMojo.java
@@ -1,5 +1,24 @@
 package org.apache.maven.its.deptree;
 
+/*
+ * 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.
+ */
+ 
 import org.apache.maven.plugin.AbstractMojo;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.MojoFailureException;
diff --git a/src/it/multi-module-plugin/src/main/java/org/apache/maven/its/deptree/ResolveDependenciesLifecycleParticipant.java b/src/it/multi-module-plugin/src/main/java/org/apache/maven/its/deptree/ResolveDependenciesLifecycleParticipant.java
index 65ac94c..43665de 100644
--- a/src/it/multi-module-plugin/src/main/java/org/apache/maven/its/deptree/ResolveDependenciesLifecycleParticipant.java
+++ b/src/it/multi-module-plugin/src/main/java/org/apache/maven/its/deptree/ResolveDependenciesLifecycleParticipant.java
@@ -1,15 +1,24 @@
-/*******************************************************************************
- * Copyright (c) 2008, 2011 Sonatype Inc. 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:
- *    Sonatype Inc. - initial API and implementation
- *******************************************************************************/
 package org.apache.maven.its.deptree;
 
+/*
+ * 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.
+ */
+
 import org.apache.maven.AbstractMavenLifecycleParticipant;
 import org.apache.maven.MavenExecutionException;
 import org.apache.maven.execution.MavenSession;
diff --git a/src/it/multi-module-test/invoker.properties b/src/it/multi-module-test/invoker.properties
index 60a1991..73ed836 100644
--- a/src/it/multi-module-test/invoker.properties
+++ b/src/it/multi-module-test/invoker.properties
@@ -1 +1,18 @@
+# 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.
+
 invoker.goals = clean install
diff --git a/src/it/multi-module-test/moduleX/src/main/java/org/apache/maven/shared/dependency/SimpleClass.java b/src/it/multi-module-test/moduleX/src/main/java/org/apache/maven/shared/dependency/SimpleClass.java
index 6a38f19..b7a96fe 100644
--- a/src/it/multi-module-test/moduleX/src/main/java/org/apache/maven/shared/dependency/SimpleClass.java
+++ b/src/it/multi-module-test/moduleX/src/main/java/org/apache/maven/shared/dependency/SimpleClass.java
@@ -1,5 +1,24 @@
 package org.apache.maven.shared.dependency;
 
+/*
+ * 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.
+ */
+ 
 public final class SimpleClass
 {
     public String someMethod()
diff --git a/src/it/multi-module-test/moduleYDepsX/src/main/java/org/apache/maven/shared/dependency/DependentClass.java b/src/it/multi-module-test/moduleYDepsX/src/main/java/org/apache/maven/shared/dependency/DependentClass.java
index dc9d863..6fe3540 100644
--- a/src/it/multi-module-test/moduleYDepsX/src/main/java/org/apache/maven/shared/dependency/DependentClass.java
+++ b/src/it/multi-module-test/moduleYDepsX/src/main/java/org/apache/maven/shared/dependency/DependentClass.java
@@ -1,5 +1,24 @@
 package org.apache.maven.shared.dependency;
 
+/*
+ * 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.
+ */
+ 
 public final class DependentClass
 {
     public String someOtherMethod()
diff --git a/src/it/multi-module-test/moduleZDepsY/src/main/java/org/apache/maven/shared/dependency/ContainingClass.java b/src/it/multi-module-test/moduleZDepsY/src/main/java/org/apache/maven/shared/dependency/ContainingClass.java
index 51c3f37..c759c2c 100644
--- a/src/it/multi-module-test/moduleZDepsY/src/main/java/org/apache/maven/shared/dependency/ContainingClass.java
+++ b/src/it/multi-module-test/moduleZDepsY/src/main/java/org/apache/maven/shared/dependency/ContainingClass.java
@@ -1,5 +1,24 @@
 package org.apache.maven.shared.dependency;
 
+/*
+ * 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.
+ */
+ 
 public final class ContainingClass
 {
     public String someOtherMethod()
diff --git a/src/it/multi-module-test/verify.bsh b/src/it/multi-module-test/verify.bsh
index 4342d2c..ea96b6e 100644
--- a/src/it/multi-module-test/verify.bsh
+++ b/src/it/multi-module-test/verify.bsh
@@ -1,3 +1,22 @@
+/*
+ * 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.
+ */
+
 import java.io.*;
 
 import org.codehaus.plexus.util.*;
diff --git a/src/main/java/org/apache/maven/shared/dependency/graph/ProjectReferenceKeyGenerator.java b/src/main/java/org/apache/maven/shared/dependency/graph/ProjectReferenceKeyGenerator.java
index feef92d..55f9127 100644
--- a/src/main/java/org/apache/maven/shared/dependency/graph/ProjectReferenceKeyGenerator.java
+++ b/src/main/java/org/apache/maven/shared/dependency/graph/ProjectReferenceKeyGenerator.java
@@ -1,5 +1,24 @@
 package org.apache.maven.shared.dependency.graph;
 
+/*
+ * 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.
+ */
+ 
 import org.apache.maven.project.MavenProject;
 
 /**
diff --git a/src/main/java/org/apache/maven/shared/dependency/graph/internal/Invoker.java b/src/main/java/org/apache/maven/shared/dependency/graph/internal/Invoker.java
index 93a3e45..e4169d0 100644
--- a/src/main/java/org/apache/maven/shared/dependency/graph/internal/Invoker.java
+++ b/src/main/java/org/apache/maven/shared/dependency/graph/internal/Invoker.java
@@ -1,5 +1,24 @@
 package org.apache.maven.shared.dependency.graph.internal;
 
+/*
+ * 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.
+ */
+ 
 import org.apache.maven.shared.dependency.graph.DependencyGraphBuilderException;
 
 import java.lang.reflect.InvocationTargetException;