I have found a post that explains how to create a workflow with no document(http://issues.alfresco.com/browse/AR-1685), I find it very useful but I cant find the java package (http://www.alfresco.org/model/bpm/1.0) and more important, I have not managed to find the org.alfresco.web.bean.workflow.StartWorkflowWizard class in which the changes need to be made.
Can anyone tell me the location of java source files in alfresco??