/**
 * FileManager contains static *awaitable* file-system functions
 */
export declare class FileManager {
    static readFile(path: string): Promise<string>;
    static writeFile(path: string, contents: string): Promise<void>;
    static copyFile(path1: string, path2: string): Promise<void>;
    static dirExists(path: string): boolean;
    /**
     * Writes a line to a file. Creates the file if it doesn't exist, or appends if it does.
     * @param path The path to the file
     * @param line The line to write to the file
     */
    static writeLine(path: string, line: string): Promise<void>;
}