Bug 5765 New Class button in empty workspace should be more supportive
User feedback: "Confused how to create my first project" We should be more supportive in the UI for this special case since it is a first time experience with the UI. Therefore when the workbench is empty we should offer to create a new Java project. Minimal solution is to show an info dialog that explains that user should create a project first and offer a button to open the Java project wizard. The same is true for the new package and new interface buttons.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/NewPackageCreationWizardPage.java
private StringDialogField fPackageDialogField;
	
	/**
	 * Status of last validation of the package field
	 */
	protected IStatus fPackageStatus;
	
	private IPackageFragment fCreatedPackageFragment;
	
	public NewPackageCreationWizardPage(IWorkspaceRoot root) {
		super(PAGE_NAME, root);
		
		setTitle(NewWizardMessages.getString("NewPackageCreationWizardPage.title")); 
		setDescription(NewWizardMessages.getString("NewPackageCreationWizardPage.description"));		 
		
		fCreatedPackageFragment= null;
		PackageFieldAdapter adapter= new PackageFieldAdapter();
		
		fPackageDialogField= new StringDialogField();
		fPackageDialogField.setDialogFieldListener(adapter);
		fPackageDialogField.setLabelText(NewWizardMessages.getString("NewPackageCreationWizardPage.package.label")); 
		
		fPackageStatus= new StatusInfo();
	}
	
	/**
	 * Should be called from the wizard with the input element.
	 */
	public void init(IStructuredSelection selection) {