You can do what Stefan has said and do the following from roo console.
The following worked for me.
You can do the following in console. Roo will create a new project and you can import it into STS. Lifted from
http://projects.spring.io/spring-roo/
mkdir hello
cd hello
roo
roo> hint
roo> project --topLevelPackage com.foo
roo> jpa setup --provider HIBERNATE --database HYPERSONIC_IN_MEMORY
roo> entity jpa --class ~.Timer --testAutomatically
roo> field string --fieldName message --notNull
roo> hint web mvc
roo> web mvc setup
roo> web mvc all --package ~.web
roo> selenium test --controller ~.web.TimerController
roo> web gwt setup
roo> web gwt all --proxyPackage ~.client.proxy --requestPackage ~.client.request
roo> perform tests
roo> quit