Write missing tests

uhabits-core/build.gradle

@@ -28,6 +28,12 @@ jacocoTestReport {
         xml.enabled = true
         html.enabled = true
     }
+
+    afterEvaluate {
+        classDirectories = files(classDirectories.files.collect {
+            fileTree(dir: it, exclude: '**/*Factory.*')
+        })
+    }
 }
 
 check.dependsOn jacocoTestReport