String karafEtc = bundleContext.getProperty("karaf.etc");
File etcDir = new File(karafEtc);
File syspropsFile = new File(etcDir, "system.properties");
FileInputStream fis = new FileInputStream(syspropsFile);
Properties props = new Properties();
props.load(fis);
fis.close();
props.setProperty("karaf.name", name);
FileOutputStream fos = new FileOutputStream(syspropsFile);
props.store(fos, "");
fos.close();