private void addFileProperties(String fileName, CompositeConfiguration conf) {
private Configuration addFileProperties(String fileName, CompositeConfiguration conf) {
    private void addFileProperties(String fileName, CompositeConfiguration conf) {        try {            Configuration newConf = new SysPropertiesConfiguration(fileName);            addIncludedFileProperties(newConf, conf);            conf.addConfiguration(newConf);            super.addConfiguration(newConf);            loadedFiles.add(fileName);        } catch (org.apache.commons.configuration.ConfigurationException e) {            throw new ConfigurationException("Error reading file" + fileName, e);        } catch (Exception ignore) {            log.debug("Configuration source " + fileName + " ignored");        }    }