Bug 117363 PathVariableSelectionDialog has references to java.io.file
M3 PathVariableSelectionDialog needs to remove it's java.io.File references
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/dialogs/PathVariableSelectionDialog.java
* @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell)
     */
    protected void configureShell(Shell shell) {
        super.configureShell(shell);
        PlatformUI.getWorkbench().getHelpSystem().setHelp(shell,
                IIDEHelpContextIds.PATH_VARIABLE_SELECTION_DIALOG);
    }
    /* (non-Javadoc)
     * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite)
     */
    protected void createButtonsForButtonBar(Composite parent) {
        createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL,
                true);
        createButton(parent, EXTEND_ID, IDEWorkbenchMessages.PathVariableSelectionDialog_extendButton, false);
        createButton(parent, IDialogConstants.CANCEL_ID,
                IDialogConstants.CANCEL_LABEL, false);
        updateExtendButtonState();
    }
    /* (non-Javadoc)
     * @see org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets.Composite)
     */
    protected Control createDialogArea(Composite parent) {
         
        Composite dialogArea = (Composite) super.createDialogArea(parent);
        pathVariablesGroup.createContents(dialogArea);
        return dialogArea;
    }
    
    /* (non-Javadoc)
     * @see org.eclipse.jface.window.Window#close()