Added missing Override annotations.

ui/net/sf/briar/ui/invitation/InvitationWizard.java

@@ -12,6 +12,7 @@ class InvitationWizard extends Wizard {
 		super(i18n, new Stri18ng("INVITATION_TITLE", i18n), WIDTH, HEIGHT);
 	}
 
+	@Override
 	public void display() {
 		showPanel("Intro");
 		super.display();

ui/net/sf/briar/ui/setup/SetupWizard.java

@@ -12,6 +12,7 @@ class SetupWizard extends Wizard {
 		super(i18n, new Stri18ng("SETUP_TITLE", i18n), WIDTH, HEIGHT);
 	}
 
+	@Override
 	public void display() {
 		showPanel("Language");
 		super.display();

ui/net/sf/briar/ui/wizard/Wizard.java

@@ -81,6 +81,7 @@ public class Wizard implements I18n.Listener {
 		frame.setPreferredSize(new Dimension(width, height));
 		frame.setResizable(false);
 		frame.addWindowListener(new WindowAdapter() {
+			@Override
 			public void windowClosing(WindowEvent e) {
 				closeButtonPressed();
 			}