import DBConnection from "./DBConnection.js";
import DBFactory from "./DBFactory.js";
export default class DBManager {
    private static instance?;
    private static _logger;
    private static get logger();
    private factory;
    private constructor();
    /**
     * Initializes the database manager with a database factory.
     * @param factory - Database connection factory.
     * @returns DBManager singleton instance.
     */
    static init(factory: DBFactory): DBManager;
    /**
     * Obtains the singleton instance of DBManager.
     * Throws an Error if init() has not been called.
     * @returns DBManager singleton instance.
     */
    static getInstance(): DBManager;
    /**
     * Resets the singleton instance (primarily for testing).
     */
    static resetInstance(): void;
    /**
     * Creates a new database connection.
     * @returns Promise resolving to a DBConnection instance.
     */
    connect(): Promise<DBConnection>;
}