Bug 30667 create 'subpackage' when doing create new package with a package selected
It should be possible to quickly create a new package as a subpackage of an already existing package. A suggestion: upon activating the new>package menu from a selected package, the name field in the dialog box could already contain the name of the selected package (possibly with the name completely selected). Just appending a ".foo" would suffice to create a subpackage thereof.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/wizards/NewPackageWizardPage.java
* Creates a new <code>NewPackageWizardPage</code>
	 */
	public NewPackageWizardPage() {
		super(PAGE_NAME);
		
		setTitle(NewWizardMessages.getString("NewPackageWizardPage.title")); 
		setDescription(NewWizardMessages.getString("NewPackageWizardPage.description"));		 
		
		fCreatedPackageFragment= null;
		PackageFieldAdapter adapter= new PackageFieldAdapter();
		
		fPackageDialogField= new StringDialogField();
		fPackageDialogField.setDialogFieldListener(adapter);
		fPackageDialogField.setLabelText(NewWizardMessages.getString("NewPackageWizardPage.package.label")); 
		
		fPackageStatus= new StatusInfo();
	}
	
	/**
	 * The wizard owning this page is responsible for calling this method with the
	 * current selection. The selection is used to initialize the fields of the wizard 
	 * page.
	 * 
	 * @param selection used to initialize the fields
	 */
	public void init(IStructuredSelection selection) {
		IJavaElement jelem= getInitialJavaElement(selection);	
		
		initContainerPage(jelem);
		setPackageText("", true);