IPhone : "Thread 1 signal SIGABRT" when trying to code a Table View

My viewcontroller.Swift is as follows:

import UIKit

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()


        let sharedDefaults = NSUserDefaults(suiteName: "group.devoncarlson.sinceextentionsharingefaults")

        sharedDefaults?.setObject("Hi I'm a Widget", forKey: "stringKey")

        sharedDefaults?.synchronize()


    }

    var eventInArray = ["Drinking"]


    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // Return the number of rows in the section.
        return eventInArray.count
    }
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) ->
        UITableViewCell {
        let cellIdentifier = "Cell"
        let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath:
        indexPath) as UITableViewCell
        // Configure the cell...
        cell.textLabel?.text = eventInArray[indexPath.row]
        return cell 
    }

    //        cell.textLabel.text = eventInArray[indexPath.row]


     override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

What is causing this? It began after linking my table view to my code. Please explain your answer as if to a five year old, I'm very new to programming.