private void validateParameters() throws DriverJobParametersException {
		if (!this.dgenInstallDir.isDirectory()) {
			throw new DriverJobParametersException("Data generator install dir `" + this.dgenInstallDir
				+ "` does not exist.");
		}
		if (!this.dgenNodePropertiesPath.isFile()) {
			throw new DriverJobParametersException("Data genenerator properties file `" + this.dgenNodePath
				+ "` does not exist.");
		}
		if (!this.dgenNodePath.isFile()) {
			throw new DriverJobParametersException("Data genenerator executable `" + this.dgenNodePath
				+ "` does not exist.");
		}
		if (!this.outputBase.isAbsolute()) {
			throw new DriverJobParametersException("Base output path `" + this.outputBase + "` should be absolute.");
		}
		if (!this.outputBase.isAbsolute()) {
			throw new DriverJobParametersException("Base output path `" + this.outputBase + "` should be absolute.");
		}
	}