added copyright
diff --git a/src/main/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchStats.java b/src/main/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchStats.java
index 1cb3dd0..683454d 100644
--- a/src/main/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchStats.java
+++ b/src/main/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchStats.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright 2017, Yahoo! Inc.
+ * Licensed under the terms of the Apache License 2.0. See LICENSE file at the project root for terms.
+ */
+
 package com.yahoo.sketches.pig.tuple;
 
 import org.apache.commons.math3.stat.descriptive.SummaryStatistics;
diff --git a/src/test/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchToMeansTest.java b/src/test/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchToMeansTest.java
index 10a1be0..263dabc 100644
--- a/src/test/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchToMeansTest.java
+++ b/src/test/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchToMeansTest.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright 2017, Yahoo! Inc.
+ * Licensed under the terms of the Apache License 2.0. See LICENSE file at the project root for terms.
+ */
+
 package com.yahoo.sketches.pig.tuple;
 
 import java.util.Random;
diff --git a/src/test/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchToVariancesTest.java b/src/test/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchToVariancesTest.java
index 5604fe5..0ecfe35 100644
--- a/src/test/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchToVariancesTest.java
+++ b/src/test/java/com/yahoo/sketches/pig/tuple/ArrayOfDoublesSketchToVariancesTest.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright 2017, Yahoo! Inc.
+ * Licensed under the terms of the Apache License 2.0. See LICENSE file at the project root for terms.
+ */
+
 package com.yahoo.sketches.pig.tuple;
 
 import java.util.Random;