BaseUserActivity.java

public abstract class BaseUserActivity extends BaseActivity {

    @Inject
    UserManager userManager;

    @Override
    protected void setupActivityComponent(AppComponent appComponent) {
        appComponent.inject(this);
        setupUserComponent();
    }

    private void setupUserComponent() {
    isUserSessionStarted = userManager.isUserSessionStartedOrStartSessionIfPossible();
    onUserComponentSetup(userManager.getUserComponent());

    //This screen cannot work when user session is not started.
    if (!isUserSessionStarted) {
        finish();
    }
}

    protected abstract void onUserComponentSetup(UserComponent userComponent);

}