minhur,
MyEclipse 2015 ships with EGit 3.4.1 by default, so you no longer need to manually install EGit in MyEclipse 2015. (Note – MyEclipse 2014 also includes EGit 3.1.0 by default)
You can configure EGit settings from Window > Preferences > Team > Git. To create/access EGit repositories, you need to open Window > Open perspective > Other > Git.
Hope this helps and let us know if you see any issues in MyEclipse.