Scoreboard?

Hi! So basically I am really bad at creating Scoreboards and I decided why not to add a Scoreboard to my Plugin but I failed and raged! So, I want to create a Scoreboard that whenever a player kill a player its going to add one point and I want this Scoreboard to be SIDEBAR.

If you can help me with this then do it: I am creating a Mini-Game and I am using WorldEdit and I want that every ting on the Selection of the Arena by the way it's a SurvivalGames plugin. So, the player needs to select 2 points using WorldEdit then they create the arena when they join all the chests around them will be filled with items, How can I make that thing?

Note!
Sorry for my bad English I am NOT English.
Sorry for not adding any Post Poll thing.

 

@MrGriefer_HGTech

Heree for the scoreboard

What have you tried thus far? concerning the chest / SG thing.

 

Can you put the Scoreboard Kill Count on Pastebin!

Here is what I did on the Chest for the SurvivalGames http://pastebin.com/ecMLjpHw

 

@MrGriefer_HGTech

Thats called 'spoonfedding', which is not a beloved thing here
The thread I linked you is not that hard. Give it some attention.

You also should initialze the variable 'p' in the constructor. @chest things.

 

You mean I put 'Player p' on the public void fillChest()?