Preparation
First of all you have to install OrientDB on your PC. Therefore just go on the OrientDB Website and follow the installation description.
http://orientdb.com/docs/2.1/Tutorial-Installation.html
After you successfully installed OrientDB you have to run the server like described here
http://orientdb.com/docs/2.1/Tutorial-Run-the-server.html
Now you have a running OrientDB Database on your PC. The next step is to download a Java-Editor like Eclipse. You can download it on the following Webside