Boilerplate Code

public class DatabaseConfig {
    private Plugin plugin;
    private FileConfiguration config;
    private CommandSender sender;

    // Fields to retrieve
    private String host;
    private int port;
    private String db;
    private boolean auth;
    private String user;
    private char[] pass;

    public DatabaseConfig(Plugin plugin) {
        this.plugin = plugin;
        config = plugin.getConfig();
        sender = plugin.getServer().getConsoleSender();

        loadConfig();
    }

    public void loadConfig() {
        File configFile = new File(plugin.getDataFolder(), "config.yml");

        if(!configFile.exists()) {
            sender.sendMessage("config.yml file not found, using default values");
            sender.sendMessage("Generating default config.yml file.");
            plugin.saveDefaultConfig();
        }

        host = config.getString("host", "127.0.0.1");
        port = config.getInt("port", 27017);
        db = config.getString("db", "mydb");
        auth = config.getBoolean("auth", false);
        user = config.getString("user", "user");
        pass = config.getString("pass", "pass").toCharArray();
    }

    public String getHost() {
        return host;
    }

    public int getPort() {
        return port;
    }

    public String getDb() {
        return db;
    }

    public boolean hasAuth() {
        return auth;
    }

    public String getUser() {
        return user;
    }

    public char[] getPass() {
        return pass;
    }

}