Northern Business Machines interview questions

I received a call from the hiring manager about a week after I applied for the position online. I was brought in for an interview, asked a lot of questions, and the gentleman I interviewed with did not have the decency to get back to me. I understand it's awkward to tell someone who you interviewed that you're not going to offer them the job, but don't leave candidates hanging who took the time to apply for a position and come in for an interview - you're a manager, you deal with many types of conflicts and sometimes have to deliver not-so-good news to customers/vendors, etc. Have some courtesy!