import org.junit.Test;
import javax.annotation.Nonnull;


public class ExplosiveJavaBaseTest {

    @Test(expected = NullPointerException.class)
    public void test() {
        new Explosive(5);
    }

    static abstract class ExplosiveBase {

        ExplosiveBase() {
            System.out.println(getMyNumber().toString());
        }

        abstract Integer getMyNumber();

    }

    static class Explosive extends ExplosiveBase {

        @Nonnull
        Integer myNumber;

        Explosive(@Nonnull Integer myNumber) {
            super();
            this.myNumber = myNumber;
        }

        @Nonnull
        @Override
        Integer getMyNumber() {
            return myNumber;
        }

    }

}