to use a lock in a try catch block

AutoLock.java

import java.util.concurrent.locks.Lock;

/**
 * to use a lock in a try catch block
 */
public class AutoLock implements AutoCloseable {
    final Lock ref;

    public AutoLock(Lock lock) {
        ref = lock;
        ref.lock();
    }

    @Override
    public void close() {
        ref.unlock();
    }
}