Prevent auth data in eclipse project from being saved to a repository

Prevent auth data in eclipse project from being saved to a repository

I'm working on an Android project with Eclipse and I use a git repository
with EGit. I have data (in my case two strings, OAuth key and secret) that
I need in my project, but I don't want it to be pushed to the git
repository.
My first thought was to define the strings as compiler parameter, as the
project settings are not included in the git repository. I'm used to doing
this in C/C++ and it is no problem in Eclipse, but in the Java/Android
project this option seems to be missing.
So, how do you set up sensitive data that is used in a java project and is
not pushed to a code repository along with the rest of the code?