added licence header and since tag
diff --git a/src/main/java/org/apache/commons/text/CasedString.java b/src/main/java/org/apache/commons/text/CasedString.java
index a89cd86..2a5c6e5 100644
--- a/src/main/java/org/apache/commons/text/CasedString.java
+++ b/src/main/java/org/apache/commons/text/CasedString.java
@@ -25,6 +25,7 @@
/**
* Handles converting from one string case to another (e.g. camel case to snake case).
+ * @since 1.13.0
*/
public class CasedString {
private String string;
diff --git a/src/test/java/org/apache/commons/text/CasedStringTest.java b/src/test/java/org/apache/commons/text/CasedStringTest.java
index 14ccc78..66fce09 100644
--- a/src/test/java/org/apache/commons/text/CasedStringTest.java
+++ b/src/test/java/org/apache/commons/text/CasedStringTest.java
@@ -1,3 +1,21 @@
+/*
+ * 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.
+ */
package org.apache.commons.text;
import org.junit.jupiter.params.ParameterizedTest;
