/**
 * Database Connection Service
 * SOLID Principles: Single Responsibility - Handle database connection only
 */
import { IDatabaseConnection, DatabaseConfig } from '../interfaces';
export declare class DatabaseConnectionService implements IDatabaseConnection {
    private pool;
    private initialized;
    constructor(config?: DatabaseConfig);
    initialize(): Promise<void>;
    query(text: string, params?: any[]): Promise<any>;
    close(): Promise<void>;
}
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