Todo App Crashing

public lazy var managedObjectContext: NSManagedObjectContext = {

import Foundation
import CoreData

public class DataController: NSObject {

    static let sharedInstance = DataController()

    private override init() {}

    private lazy var applicationDocumentsDirectory: NSURL = {
       let urls = NSFileManager.defaultManager().URLsForDirectory(.DesktopDirectory, inDomains: .UserDomainMask)
        return urls[urls.endIndex.predecessor()]
    }()

    private lazy var managedObjectModel: NSManagedObjectModel = {
       let modelURL = NSBundle.mainBundle().URLForResource("TodoList", withExtension: "momd")!
        return NSManagedObjectModel(contentsOfURL: modelURL)!
    }()

    private lazy var persistantStoreCoordinator: NSPersistentStoreCoordinator = {
       let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
        let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("TodoList.sqlite")

        do {
            try coordinator.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil)

        } catch {
            let userInfo: [String: AnyObject] = [
                NSLocalizedDescriptionKey: "Failed to Initialize the Application's Saved Data",
                NSLocalizedFailureReasonErrorKey: "There Was An Error Creating or Loading the Application's Saved Data",
                NSUnderlyingErrorKey: error as NSError
            ]

            let wrappedError = NSError(domain: "au.com.stucowley.CoreDataError", code: 9999, userInfo: userInfo)
            print("Unresolved Error \(wrappedError), \(wrappedError.userInfo)")
            abort()
        }

        return coordinator
    }()

    public lazy var managedObjectContext: NSManagedObjectContext = {
       let coordinator = self.persistantStoreCoordinator
        let managedObjectContext = NSManagedObjectContext(concurrencyType: .MainQueueConcurrencyType)

        managedObjectContext.persistentStoreCoordinator = coordinator

        return managedObjectContext
    }()

    public func saveContext() {
        if managedObjectContext.hasChanges {
            do {
                try managedObjectContext.save()
            } catch let error as NSError {
                print("Unresolved Error \(error), \(error.userInfo)")
            }
        }
    }
}