Update src/main/java/org/bukkit/event/Event.java

Added some spacing that was missing in the Javadoc
Merge #1

Thanks NuclearW for the first PR to Javadocs

commit de1f02609cf7b3bfb1db8da1dcc49ee8d76a9b98
Author: NuclearW
Date:   2013-02-02 01:04:17 -0500

Update src/main/java/org/bukkit/event/Event.java

Added some spacing that was missing in the Javadoc