UserNotFoundException code does not contain imports

[mdbudnick]

The code should be:

package bookmarks;

import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ResponseStatus;

@ResponseStatus(HttpStatus.NOT_FOUND)
class UserNotFoundException extends RuntimeException {

public UserNotFoundException(String userId) {
	super("could not find user '" + userId + "'.");
}

}

[gregturn]

This tutorial was completely rewritten as of 63d3937.

I suggest you read it from the top and be sure to let us know if you spot any issues!