You will need add entries into your pom.xml to use Bukkit as a dependency in your project. Bukkit is not found on the maven central repository, you will need to add the Bukkit repository in addition to the Bukkit dependency declaration.
<project>
[...]
<repositories>
[...]
<!-- Bukkit can be found at the following repository --><repository><id>bukkit-repo</id><url>http://repo.bukkit.org/content/groups/public/</url></repository></repositories>
[...]
<dependencies>
[...]
<!-- Dependency information --><dependency><groupId>org.bukkit</groupId><artifactId>bukkit</artifactId><scope>provided</scope><!-- Bukkit API Version, change if necessary --><version>1.6.4-R2.0</version></dependency></dependencies>
[...]
</project>