Add license header to java files

See gh-46065

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/projects/aot-module-info/src/main/java/module-info.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2012-present the original author or authors.
+ *
+ * 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 at
+ *
+ *      https://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.
+ */
+
 module sampleApp {
 	requires spring.context;
 	requires spring.boot;