Program: 38830
Project: 38830
Buggy source:
public void onEnable(){
  desc=getDescription();
  dataFolder=getDataFolder();
  if (!dataFolder.exists())   dataFolder.mkdirs();
  xAuthSettings.setup();
  xAuthMessages.setup();
  if (xAuthSettings.autoDisable && getServer().getOnlineMode()) {
    xAuthLog.warning("String_Node_Str");
    getServer().getPluginManager().disablePlugin(this);
    return;
  }
  initializePlugins();
  if (xAuthSettings.downloadLib && Database.getDBMS() == DBMS.H2 && !Util.checkLibrary()) {
    xAuthLog.info("String_Node_Str");
    Util.downloadLibrary();
    xAuthLog.info("String_Node_Str");
    getServer().getPluginManager().disablePlugin(this);
    return;
  }
  Database.connect();
  if (!Database.isConnected()) {
    xAuthLog.severe("String_Node_Str");
    getServer().getPluginManager().disablePlugin(this);
    return;
  }
  DbUpdate dbUpdate=new DbUpdate();
  if (!dbUpdate.checkVersion()) {
    xAuthLog.info("String_Node_Str");
    dbUpdate.update();
  }
  DbUtil.deleteExpiredSessions();
  loadTeleLocations();
  File oldAuthFile=new File(dataFolder,"String_Node_Str");
  if (oldAuthFile.exists())   importAccounts(oldAuthFile);
  Database.printStats();
  Player[] players=getServer().getOnlinePlayers();
  if (players.length > 0)   handleReload(players);
  (new xAuthPlayerListener(this)).registerEvents();
  (new xAuthBlockListener(this)).registerEvents();
  (new xAuthEntityListener(this)).registerEvents();
  getCommand("String_Node_Str").setExecutor(new RegisterCommand(this));
  getCommand("String_Node_Str").setExecutor(new LoginCommand(this));
  getCommand("String_Node_Str").setExecutor(new ChangePasswordCommand(this));
  getCommand("String_Node_Str").setExecutor(new LogoutCommand(this));
  getCommand("String_Node_Str").setExecutor(new xAuthCommand(this));
  xAuthLog.info("String_Node_Str" + desc.getVersion() + "String_Node_Str");
}

Fixed version (ground truth):
public void onEnable(){
  desc=getDescription();
  dataFolder=getDataFolder();
  if (!dataFolder.exists())   dataFolder.mkdirs();
  xAuthSettings.setup();
  xAuthMessages.setup();
  if (xAuthSettings.autoDisable && getServer().getOnlineMode()) {
    xAuthLog.warning("String_Node_Str");
    getServer().getPluginManager().disablePlugin(this);
    return;
  }
  initializePlugins();
  if (xAuthSettings.downloadLib && Database.getDBMS() == DBMS.H2 && !checkLibrary()) {
    xAuthLog.info("String_Node_Str");
    downloadLibrary();
    xAuthLog.info("String_Node_Str");
    getServer().getPluginManager().disablePlugin(this);
    return;
  }
  Database.connect();
  if (!Database.isConnected()) {
    xAuthLog.severe("String_Node_Str");
    getServer().getPluginManager().disablePlugin(this);
    return;
  }
  DbUpdate dbUpdate=new DbUpdate();
  if (!dbUpdate.checkVersion()) {
    xAuthLog.info("String_Node_Str");
    dbUpdate.update();
  }
  DbUtil.deleteExpiredSessions();
  loadTeleLocations();
  File oldAuthFile=new File(dataFolder,"String_Node_Str");
  if (oldAuthFile.exists())   importAccounts(oldAuthFile);
  DbUtil.printStats();
  Player[] players=getServer().getOnlinePlayers();
  if (players.length > 0)   handleReload(players);
  (new xAuthPlayerListener(this)).registerEvents();
  (new xAuthBlockListener(this)).registerEvents();
  (new xAuthEntityListener(this)).registerEvents();
  getCommand("String_Node_Str").setExecutor(new RegisterCommand(this));
  getCommand("String_Node_Str").setExecutor(new LoginCommand(this));
  getCommand("String_Node_Str").setExecutor(new ChangePasswordCommand(this));
  getCommand("String_Node_Str").setExecutor(new LogoutCommand(this));
  getCommand("String_Node_Str").setExecutor(new xAuthCommand(this));
  xAuthLog.info("String_Node_Str" + desc.getVersion() + "String_Node_Str");
}