Add license to Extensions.java
+/*
+ *Copyright (c) 2022, WSO2 LLC. (http://www.wso2.com) All Rights Reserved.
+ *
+ *WSO2 LLC. 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.wso2.micro.integrator.server;
import org.apache.commons.logging.Log;
