Visit to HK to meet my friend

Hi,
I am visiting HK on 15th Sep 2016 and my return flight is on 19th September. I am an Indian. I have read that it will be an on arrival visa for 14 days.

My friend who is a doctor is doing his research fellowship in a hospital in HK. I am coming to meet him and have fun in HK. We have a plan to go to Macau and Disneyland.

What documents do I need to carry to enter HK as a tourist?
Please help.