The Documentation annotation marks that something is just
Why does this exist?
This annotation was created to deal with an issue regarding the
"package-info.java" files, which is the preferred place for package level
documentation according to the Javadoc 1.5 specification. The problem is
that somewhere in our build system (Javac, Ant, NetBeans), it determines
that the "package-info.java" file needs to be compiled every time. This is
usually due to the fact that by default a "package-info.java" file generates
no "package-info.class" file. However, if there is an annotation on the
package, which is specified in the "package-info.java" file, then it must
create a corresponding "package-info.class". Thus, if you add this annotation
to the package, it will remove the compilation problems.