Bug 97523 [Import/Export] Get overwrite prompt before no resources selected prompt
3.1 RC1 - File > Export > Archive - clear any selected resources - enter an archive file name where the file already exists - Finish - it prompts to overwrite the file; choose Yes - it says "There are no resources currently selected for export" (OK) Should get the "no resources" prompt first, and not bother with the second one. Should check the other export wizards too.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardFileSystemResourceExportPage1.java
*/
    protected void createOverwriteExisting(Group optionsGroup, Font font) {
        
        overwriteExistingFilesCheckbox = new Button(optionsGroup, SWT.CHECK
                | SWT.LEFT);
        overwriteExistingFilesCheckbox.setText(DataTransferMessages.ExportFile_overwriteExisting);
        overwriteExistingFilesCheckbox.setFont(font);
    }
    /**
     * Attempts to ensure that the specified directory exists on the local file system.
     * Answers a boolean indicating success.
     *
     * @return boolean
     * @param directory java.io.File
     */
    protected boolean ensureDirectoryExists(File directory) {
        if (!directory.exists()) {
            if (!queryYesNoQuestion(DataTransferMessages.DataTransfer_createTargetDirectory))
                return false;
            if (!directory.mkdirs()) {
                displayErrorDialog(DataTransferMessages.DataTransfer_directoryCreationError);
                giveFocusToDestination();
                return false;
            }
        }
        return true;
    }
    /**
     *	If the target for export does not exist then attempt to create it.
     *	Answer a boolean indicating whether the target exists (ie.- if it