diff --git a/hivesterix-optimizer/pom.xml b/hivesterix-optimizer/pom.xml
index 55d6adf..cc551a5 100644
--- a/hivesterix-optimizer/pom.xml
+++ b/hivesterix-optimizer/pom.xml
@@ -1,4 +1,18 @@
 <?xml version="1.0"?>
+<!--
+ ! Copyright 2009-2013 by The Regents of the University of California
+ ! Licensed 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 from
+ ! 
+ !     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.
+ !-->
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
diff --git a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rulecollections/HiveRuleCollections.java b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rulecollections/HiveRuleCollections.java
index a049f15..959e73e 100644
--- a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rulecollections/HiveRuleCollections.java
+++ b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rulecollections/HiveRuleCollections.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed 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 from
+ * 
+ *     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 edu.uci.ics.hivesterix.optimizer.rulecollections;
 
 import java.util.LinkedList;
diff --git a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/InsertProjectBeforeWriteRule.java b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/InsertProjectBeforeWriteRule.java
index 90777ee..6e2f3f3 100644
--- a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/InsertProjectBeforeWriteRule.java
+++ b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/InsertProjectBeforeWriteRule.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed 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 from
+ * 
+ *     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 edu.uci.ics.hivesterix.optimizer.rules;
 
 import java.util.ArrayList;
diff --git a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/IntroduceEarlyProjectRule.java b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/IntroduceEarlyProjectRule.java
index 0a18629..39ae2d3 100644
--- a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/IntroduceEarlyProjectRule.java
+++ b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/IntroduceEarlyProjectRule.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed 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 from
+ * 
+ *     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 edu.uci.ics.hivesterix.optimizer.rules;
 
 import java.util.ArrayList;
diff --git a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/LocalGroupByRule.java b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/LocalGroupByRule.java
index 90ca008..cd5d27b 100644
--- a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/LocalGroupByRule.java
+++ b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/LocalGroupByRule.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed 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 from
+ * 
+ *     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 edu.uci.ics.hivesterix.optimizer.rules;
 
 import org.apache.commons.lang3.mutable.Mutable;
diff --git a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/RemoveRedundantSelectRule.java b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/RemoveRedundantSelectRule.java
index 44ff12d..0dfe5c5 100644
--- a/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/RemoveRedundantSelectRule.java
+++ b/hivesterix-optimizer/src/main/java/edu/uci/ics/hivesterix/optimizer/rules/RemoveRedundantSelectRule.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed 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 from
+ * 
+ *     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 edu.uci.ics.hivesterix.optimizer.rules;
 
 import org.apache.commons.lang3.mutable.Mutable;