private boolean isValidFileExtension(String fileExtension) {
		boolean isValid = false;
		int nbrOfFileExtensions = this.validFileExtensions.length;
		
		for (int i = 0; i < nbrOfFileExtensions; i++) {
			if (fileExtension.equalsIgnoreCase(this.validFileExtensions[i])) {
				isValid = true;
				break;
			}
		}
		return isValid;
	}