Visual Studio Code – What regex would I use to add javadocs to a java program in vscode?

My current attempt:
Find: (^$n[s]*.*{|^$n[s]*.*@.*$)
Replace: /***/$1

Problem: works well except for the fact that the javadoc boilerplate is not indented.

What change would I implement to indent it accurately?

Input:

public class Main {

    class innerClass {

        int a;
        int b;

        @Override
        private int goo() {

        }
    }

    String a;

    public static void main (String[] args) {
        // blablabla
    }

    @Override
    public int foo(int a) {

    }
}

output:

/***/
public class Main {
/***/
    class innerClass {

        int a;
        int b;
/***/
        @Override
        private int goo() {

        }
    }

    String a;
/***/
    public static void main (String[] args) {
        // blablabla
    }
/***/
    @Override
    public int foo(int a) {

    }
}

Expected output:

/***/
public class Main {
    /***/
    class innerClass {

        int a;
        int b;
        /***/
        @Override
        private int goo() {

        }
    }

    String a;
    /***/
    public static void main (String[] args) {
        // blablabla
    }
    /***/
    @Override
    public int foo(int a) {

    }
}