Dispose document when done

Change-Id: I73a1cb1c206a2f55ec0c8948fca29b3976a51e75

dbaccess/qa/unit/hsqldb.cxx

@@ -42,6 +42,9 @@ void HSQLDBTest::testEmptyDBConnection()
         getDocumentForFileName("hsqldb_empty.odb");
 
     getConnectionForDocument(xDocument);
+
+    css::uno::Reference<css::lang::XComponent>(
+        xDocument, css::uno::UNO_QUERY_THROW)->dispose();
 }
 
 CPPUNIT_TEST_SUITE_REGISTRATION(HSQLDBTest);