Preferences API plus Linux. Saving entries system wide.

Hi:
I hope you know a little more about this than I do:
I want to (one time) write a key-value pair into the Registry (Windows) / the according xml file (Linux).
Since this entry should be available for all users, I used the following line to save it system wide:
Preferences prefs = Preferences.systemRoot().node(this.getClass().getName());
In the Windows Registry it can be found here:
HKEY_LOCAL_MACHINE/ SOFTWARE/JavaSoft/Prefs
Under Linux the prefs.xml file which contains the key value pair can be found here:
/etc/.java/.systemPrefs/_!':!.../prefs.xml
But, in order to create this file under Linux I had to temporarily change the access rights of the directory "/etc/.java/.systemPrefs" plus the two files inside this directory (".system.lock" and ".systemRootModFile") to 777.
Afterwards I executed my Java program which set the entry I am talking about.
At the end I set back the access rights of the ".systemPrefs" directory plus the two files mentioned above.
The file prefs.xml has the following access rights:
-rw-r--r--
So, everyone has at least read access (which is great).
My question:
- Since other people should use this program in the future too: is there an easier / better way to set system wide preferences?
For an answer thank you very much in advance.
Joey

Hi jschell:
Thank you for your answer.
The way you describe it is exactly how it is done till now.
My task is to find out the way to do it using the Properties API plus solving potential problems (like the one described above).
I just took a look at my question again. I wrote "Since other people should use this program in the future too: is there an easier / better way to set system wide preferences?".
What I wanted to ask is: "Since other people should install this program in the future too, is there an easier / better way to set system wide preferences (by using the Properties API)?"

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