in src/main/java/com/googlesource/gerrit/plugins/webhooks/WebhooksConfig.java [60:66]
protected boolean onSave(CommitBuilder commit) throws IOException, ConfigInvalidException {
if (Strings.isNullOrEmpty(commit.getMessage())) {
commit.setMessage("Updated webhooks\n");
}
saveConfig(cfgFileName, cfg);
return true;
}