init(registry) {
		super.init(registry);

		if (this.opts.interval > 0) {
			this.timer = setInterval(() => this.flush(), this.opts.interval * 1000);
			this.timer.unref();
		}

		this.folder = path.resolve(this.opts.folder);
		makeDirs(this.folder);
	}
Initialize reporter.

@param {MetricRegistry} registry
@memberof CSVReporter