Updated missing copyright info

Author: de-jcup

asciidoctor-editor-plugin/src/main/java/de/jcup/asciidoctoreditor/asciidoc/RootLocationProvider.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2022 Albert Tregnaghi
+ *
+ * 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
+ *		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 de.jcup.asciidoctoreditor.asciidoc;
 
 import java.nio.file.Path;