It won't work to have your eclipse workspace be inside Tomcat's webapps directory. The directory structure for an eclipse workspace is different than what Tomcat is expecting for a web application.
The best practice for developing web applications is to develop them in a workspace that is not associated with any application server, and then deploy them to the application server. I'm not familiar with Exadel Studio, but I'm sure it has tools specifically designed to package and deploy your application. Look in the documentation for a heading like "running your web application on a server" or "packaging your application".