[news.eclipse.platform.pde] PDE and Maven?

["klm" <ddd@xxxxxxx>]

I am trying to create a Maven module containing the PDE "Hello World" 
example.

/**
 * the command has been executed, so extract extract the needed information
 * from the application context.
 */
public Object execute(ExecutionEvent event) throws ExecutionException {


 IWorkbenchWindow window = 
HandlerUtil.getActiveWorkbenchWindowChecked(event);
 MessageDialog.openInformation(window.getShell(),"Test", "Hello, Eclipse 
world");



But the above call:

window.getShell()

gives the error:

The type org.eclipse.swt.widgets.Shell cannot be resolved. It is indirectly 
referenced from required .class files

Even though I have made the following dependencies in my POM file:

<dependency>
 <groupId>swt</groupId>
 <artifactId>jface</artifactId>
 <version>3.0m8</version>
</dependency>

<dependency>
 <groupId>org.eclipse.core</groupId>
 <artifactId>commands</artifactId>
 <version>3.3.0-I20070605-0010</version>
</dependency>


<dependency>
  <groupId>org.eclipse.ui</groupId>
  <artifactId>workbench</artifactId>
  <version>3.3.0-I20070608-1100</version>
</dependency>

Any ideas?