Problems with building bukkit

So i have downloaded bukkit by this guide and i got errors.

1. I got 2 errors in bukkit java files

Code:

Description    Resource    Path    Location    Type
The method isCancelled() of type EntityCombustEvent must override a superclass method    EntityCombustEvent.java    /bukkit/src/main/java/org/bukkit/event/entity    line 19    Java Problem
The method setCancelled(boolean) of type EntityCombustEvent must override a superclass method    EntityCombustEvent.java    /bukkit/src/main/java/org/bukkit/event/entity    line 24    Java Problem

Is that broken code in repository or i screwed up something?

2. When i try to compile craftbukkit, it gives me that error:

Code:

[ERROR] Failed to execute goal on project craftbukkit: Could not resolve dependencies for project org.bukkit:craftbukkit:jar:0.0.1-SNAPSHOT: Failure to find org.bukkit:bukkit:jar:0.0.1-SNAPSHOT in http://dl.dwim.org/~ebroes/maven was cached in the local repository, resolution will not be reattempted until the update interval of tmp-repo has elapsed or updates are forced -> [Help 1]

Is that problem related to problem 1 maybe?

Any ideas, what i did wrong? Thanks for your help.