/// <reference types="node" />
import { WriteStream } from 'fs';
export declare class FileManager {
    private static _instance;
    static get Instance(): FileManager;
    readFile(path: string): Promise<string | undefined>;
    writeFile(path: string, data: string): Promise<void>;
    createFolder(path: string): Promise<void>;
    removeFile(path: string): Promise<void>;
    exists(path: string): Promise<boolean>;
    createTmpWriteStream(): Promise<WriteStream>;
    private openTmpFd;
}