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I think you have to start the process from jbpm-console to see that in the reports.

If you just want history, then you have to enable persistence in your java app that is running processes.

EntityManagerFactory emf =

                    Persistence.createEntityManagerFactory("org.jbpm.persistence.jpa");

            Environment env = KnowledgeBaseFactory.newEnvironment();

            env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);

            // create a new knowledge session that uses JPA to store the runtime state

            StatefulKnowledgeSession ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null, env);

            JPAWorkingMemoryDbLogger dblogger = new JPAWorkingMemoryDbLogger(ksession);

            KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newThreadedFileLogger(ksession, "test", 1000);

            ksession.getWorkItemManager().registerWorkItemHandler("myWorkItem", new MyWorkItemHandler());

            int sessionId = ksession.getId();

            ProcessInstance pi = (ProcessInstance) ksession.startProcess(processId);

            System.out.println("Process started ... sessionId = " + sessionId + " processId = " + pi.getId());

            logger.close();

            dblogger.dispose();

            ksession.dispose();

If you are using junit tests, then have a look at JBPMHelper.java in source code of jbpm5.2