AuthenFacade.java

package testme;

import com.google.inject.ImplementedBy;

@ImplementedBy(AuthenFacadeImpl.class)
public interface AuthenFacade {
    boolean login();
}

AuthenFacadeImpl.java

package testme;

public class AuthenFacadeImpl implements AuthenFacade {
    @Override
    public boolean login() {
        return false;
    }
}

Main.java

package testme;

import com.google.inject.Binder;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;
import com.google.inject.Inject;


public class Main {
    @Inject
    private transient AuthenFacade af;

    public static void main(String[] args) {
        Injector injector = Guice.createInjector(new Module() {
            @Override
            public void configure(Binder binder) {
            }
        });

        Main mainMe = injector.getInstance(Main.class);
        System.out.println(mainMe.af.login());
    }

}