Can't get Fragment Manager in my Activity that extends YouTubeBaseActivity

Question

So my app has a Youtube Player view in the main activity, my initial intention was to add a Tablayout with it's ViewPager, however, when coding I realised i couldn't get Support Fragment manager for my Adapter.

Header of my class:

public class MainActivity extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener,
            YouTubePlayer.PlaybackEventListener {