Bug 305200 [EditorMgmt] FileEditorMappingContentProvider could just be replaced by ArrayContentProvider
This class doesn't seem to be very useful.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/WizardExportPage.java
* @return <code>true</code> if the resource name is suitable for export based 
     *   upon its extension
     */
    protected boolean hasExportableExtension(String resourceName) {
        if (selectedTypes == null) {
			return true;
		}
        int separatorIndex = resourceName.lastIndexOf(".");
        if (separatorIndex == -1) {
			return false;
		}
        String extension = resourceName.substring(separatorIndex + 1);
        Iterator it = selectedTypes.iterator();
        while (it.hasNext()) {
            if (extension.equalsIgnoreCase((String) it.next())) {
				return true;
			}
        }
        return false;
    }
    /**
     * Persists additional setting that are to be restored in the next instance of
     * this page.
     * <p> 
     * The <code>WizardImportPage</code> implementation of this method does
     * nothing. Subclasses may extend to persist additional settings.
     * </p>
     */
    protected void internalSaveWidgetValues() {
    }