diff --git a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/LuminanceToGray.java b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/LuminanceToGray.java
index 9b24dcca..9635afe8 100644
--- a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/LuminanceToGray.java
+++ b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/LuminanceToGray.java
@@ -1,3 +1,33 @@
+/*
+ * Copyright (c) 2021, Harald Kuhr
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
 package com.twelvemonkeys.imageio.plugins.jpeg;
 
 import com.twelvemonkeys.lang.Validate;
@@ -10,11 +40,11 @@ import java.awt.image.RasterOp;
 import java.awt.image.WritableRaster;
 
 /**
- * LumaToGray.
+ * LuminanceToGray.
  *
  * @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
  * @author last modified by $Author: haraldk$
- * @version $Id: LumaToGray.java,v 1.0 10/04/2021 haraldk Exp$
+ * @version $Id: LuminanceToGray.java,v 1.0 10/04/2021 haraldk Exp$
  */
 final class LuminanceToGray implements RasterOp {
 
diff --git a/imageio/imageio-jpeg/src/test/java/com/twelvemonkeys/imageio/plugins/jpeg/LuminanceToGrayTest.java b/imageio/imageio-jpeg/src/test/java/com/twelvemonkeys/imageio/plugins/jpeg/LuminanceToGrayTest.java
index a6485fda..a47d48da 100644
--- a/imageio/imageio-jpeg/src/test/java/com/twelvemonkeys/imageio/plugins/jpeg/LuminanceToGrayTest.java
+++ b/imageio/imageio-jpeg/src/test/java/com/twelvemonkeys/imageio/plugins/jpeg/LuminanceToGrayTest.java
@@ -1,3 +1,33 @@
+/*
+ * Copyright (c) 2021, Harald Kuhr
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
 package com.twelvemonkeys.imageio.plugins.jpeg;
 
 import org.junit.Test;
@@ -9,13 +39,6 @@ import java.util.Arrays;
 
 import static org.junit.Assert.*;
 
-/**
- * LumaToGrayTest.
- *
- * @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
- * @author last modified by $Author: haraldk$
- * @version $Id: LumaToGrayTest.java,v 1.0 10/04/2021 haraldk Exp$
- */
 public class LuminanceToGrayTest {
     @Test
     public void testConvertByteYcc() {