getVersion

public static String getVersion() {
		String packageName = Bukkit.getServer().getClass().getPackage().getName();
        // Get full package string of CraftServer.
        // org.bukkit.craftbukkit.versionstring (or for pre-refactor, just org.bukkit.craftbukkit
        String version = packageName.substring(packageName.lastIndexOf('.') + 1);
        return version;
	}