N-Bot API is an open-source project using JDA which will allow you create/personalize your bots simplest through a plugin system.
For use it download the latest release and execute the following command java -jar N-Bot-VERSION-withDependencies.jar a config folder will appear who contains an config.json file. Open it and insert your bot token, now you can re-execute the previous command, folders are going to generate. When you want to stop the bot, just print stop in the console.
For create a plugin, add the N-Bot API on your project libraries, your main class will need to extends NBotPlugin who contains onLoad(), onRegisterCommands(), onEnable() and onDisable() methods with @Override annotation.
public class MyPlugin extends NBotPlugin
{
  public MyPlugin()
  {
    super("Author");
  }
  @Override
  public void onCommandRegisters()
  {
     NBot.getLogger().info("Command registered for MyPlugin.");
  }
  @Override
  public void onLoad()
  {
     NBot.getLogger().info("MyPlugin is loaded.");
  }
  @Override
  public void onLoad()
  {
     NBot.getLogger().info("MyPlugin is enabled.");
  }
  @Override
  public void onDisable()
  {
     NBot.getLogger().info("MyPlugin is disabled.");
  }
}You can too create commands, create a class and insert methods with @Command annotation like this.
import fr.neutronstars.nbot.entity.User;
import fr.neutronstars.nbot.entity.Channel;
import fr.neutronstars.nbot.entity.Message;
public class MyCommand
{
  @Command(name="info",description="Shows the bot informations.",powers=10)
  public void onInfo(User user, Channel channel, Message message)
  {
      //Your Code.
  }
}and register your command class in the onCommandRegisters() method like this.
import fr.neutronstars.nbot.command.CommandManager;
public class MyPlugin extends NBotPlugin
{
  @Override
  public void onCommandRegisters()
  {
     super.registerCommand(MyCommand.class);
  }
}To ensure that your plugin is valid you will also have to add a plugin.json at your root.
{
  "main":"packages.MainClass",
  "name":"My Plugin",
  "version":"0.0.1-SNAPSHOT"
}Generate your .jar and put it in the plugins folder.