How to wrap ojButton's in ojButtonset?

Not quite sure what issues you are having, as you have not provided the version of JET that you are using, or any error messages that may point to the problem.

Here is a code sample that shows how a buttonset can be setup:

<code>

    <div id="formatset"

        data-bind="ojComponent: {component: 'ojButtonset',

                                  optionChange: handleFormatChange}"

        aria-controls="formattedText">

      <button data-bind="ojComponent: {component: 'ojButton', label:'One'}"></button>

      <button data-bind="ojComponent: {component: 'ojButton', label:'Two'}"></button>

      <button data-bind="ojComponent: {component: 'ojButton', label:'Three'}"></button>

    </div>

</code>