package net.acomputerdog.picam;

public class PiCamController {
}

package net.acomputerdog.picam;

public class PiCamController {

    private PiCamController() {

    }

    private void run() {

    }

    public static void main(String[] args) {
        new PiCamController().run();
    }
}

Make main class runnable