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
IResource.ROOT | IResource.PROJECT | IResource.FOLDER
                        | IResource.FILE);
        if (result.isOK() && workspace.getRoot().exists(testPath)) {
			return workspace.getRoot().findMember(testPath);
		}
        return null;
    }
    /**
     * Returns the current contents of the types entry field, or its set
     * initial value if it does not exist yet (which could be <code>null</code>).
     *
     * @return the types entry field's current value or anticipated initial value,
     *   or <code>null</code>
     */
    public String getTypesFieldValue() {
        if (typesToExportField == null) {
			return initialTypesFieldValue;
		}
        return typesToExportField.getText();
    }
    /**
     * Returns the resource extensions currently specified to be exported.
     *
     * @return the resource extensions currently specified to be exported (element 
     *   type: <code>String</code>)
     */
    protected List getTypesToExport() {
        List result = new ArrayList();
        StringTokenizer tokenizer = new StringTokenizer(typesToExportField
                .getText(), TYPE_DELIMITER);