Best practices for seperate releases of parent and modules

[nicklist]

At our company we are busy with a commons project, which has a few submodules. 
Our current layout is:

commons-parent/
   commons-module-1/
      pom.xml
      src/
   commons-module-2/
   commons-module-3/
   pom.xml

Now we want to do seperate releases of the commons-parent and the modules, just 
like the Maven plugins.

Is it advisable to move the commons-parent to another subdirectory or is this 
layout the preferred way?

I mean the following layout:
commons/
   commons-parent/
      pom.xml
   commons-module-1/
      pom.xml
      src/
   commons-module-2/
   commons-module-3/

With regards,

Nick Stolwijk