This is the right idea. When you register and use multiple domains names is great for building your business, protecting your brand name, and creating a dynamic online identity.
Multiple domain names will help you:
1-Protect your brand and online identity
2-Capture common misspellings of your domain name, instead of sending visitors to an error page.
3-Provide customers more ways to find you when searching the Internet
4-Keep your competition from registering a similar domain name drawing customers to them instead of you
5-Promote the different products and services you offer
6-Drive more traffic to your website
7-Enjoy more opportunities to market to — and be listed in — search engines
8-Create distinct advertising strategies reaching different target markets