This is currently what I have for my `init`,

```
- (id)init 
{
    self = [super init];

    if (self) {
        self.url = [[NSURL alloc] init];
        self.blurb = [[NSString alloc] init];
        self.author = [[NSString alloc] init];
    }

    return self;
}

```

It does nothing, but I have another method called `initWithObject:` that will use its argument to fill up the instance variables `url`, `blurb`, and `author`. I don't know what I should be doing with this `init`. Should I throw an exception? What other options do I have?