Bug 150998 [Import/Export] Import Projects Wizard: Finish is enabled even if no project is selected
In Import Existing Projects Wizard, the Finish button is enabled even when no projects are selected for import. When the Import wizard is first invoked, Finish is disabled, since no projects have been selected for import. If a directory with no Eclipse projects is selected, Finish remains disabled. If a directory with at least one Eclipse project is selected, then Finish becomes enabled. If none of the projects are selected for import, then Finish remains enabled. Although this behaviour does not cause any functional problems, the UI seems inconsistent.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardProjectsImportPage.java
protected boolean executeImportOperation(ImportOperation op) {
		
		try {
			getContainer().run(true, true, op);
		} catch (InterruptedException e) {
			return false;
		} catch (InvocationTargetException e) {
			
			return false;
		}
		IStatus status = op.getStatus();
		if (!status.isOK()) {
			ErrorDialog.openError(getContainer().getShell(),
					DataTransferMessages.FileImport_importProblems, null, 
					
					
					status);
			return false;
		}
		return true;
	}
	/**
	 * The <code>WizardDataTransfer</code> implementation of this
	 * <code>IOverwriteQuery</code> method asks the user whether the existing
	 * resource at the given path should be overwritten.
	 * 
	 * @param pathString
	 * @return the user's reply: one of <code>"YES"</code>, <code>"NO"</code>,
	 *         <code>"ALL"</code>, or <code>"CANCEL"</code>
	 */