diff --git a/README.md b/README.md
index 8b8f2a8..5d05188 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 
 A repository with three variants of a javafx projects, with maven setup for Java 16 and JavaFX 16, and JUnit 5 (Jupiter) and TestFX for testing.
 
-To make the project(s) more interesting, it is the start of an [RPN](https://en.wikipedia.org/wiki/Reverse_Polish_notation) calculator (look for `// TODO`) markers). The core logic is almost implemented (in [Calc.java](javafx-template/src/main/java/app/Calc.java)), the fxml file (in [App.fxml](javafx-template/src/main/resources/app/App.fxml) is almost complete, but the controller class (in [AppController.java](javafx-template/src/main/java/app/AppController.java) is pretty limited. And last, but not least, there is a TestFX-based test (in [AppTest.java](javafx-template/src/test/java/app/AppTest.java), see the [README](javafx-template/src/test/java/app/README.md) for details about what it tests).
+To make the project(s) more interesting, it is the start of an [RPN](https://en.wikipedia.org/wiki/Reverse_Polish_notation) calculator (look for `// TODO`) markers). The core logic is almost implemented (in [Calc.java](javafx-template/src/main/java/app/Calc.java)), the fxml file (in [Calc.fxml](javafx-template/src/main/resources/app/App.fxml) is almost complete, but the controller class (in [CalcController.java](javafx-template/src/main/java/app/AppController.java) is pretty limited. And last, but not least, there is a TestFX-based test (in [CalcAppTest.java](javafx-template/src/test/java/app/AppTest.java), see the [README](javafx-template/src/test/java/app/README.md) for details about what it tests).
 
 ## javafx-template
 
@@ -21,6 +21,6 @@ Template for  multi-module, multi-package javafx project.
 
 All projects can be tried out by cd-ing into the corresponding folder and using `mvn`:
 
-- compile with `mvn compile` (after `cd javafx-template` of course)
+- compile with `mvn compile` (after `cd oysteikt-calc` of course)
 - test with `mvn test` (it should fail until you complete the RPN calculator)
 - run with `mvn javafx:run` (it should open, but not work properly)
diff --git a/oysteikt-calc/pom.xml b/oysteikt-calc/pom.xml
index 66bb246..7d10054 100644
--- a/oysteikt-calc/pom.xml
+++ b/oysteikt-calc/pom.xml
@@ -2,8 +2,8 @@
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>it1901</groupId>
-  <artifactId>javafx-template</artifactId>
-  <version>0.0.1-SNAPSHOT</version>
+  <artifactId>oysteikt-calc</artifactId>
+  <version>1.0.0</version>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -90,7 +90,7 @@
         <!-- Default configuration for running -->
         <!-- Usage: mvn javafx:run -->
         <configuration>
-          <mainClass>app.App</mainClass>
+          <mainClass>oysteikt.calc.CalcApp</mainClass>
         </configuration>
       </plugin>
     </plugins>
diff --git a/oysteikt-calc/src/main/java/app/Calc.java b/oysteikt-calc/src/main/java/oysteikt/calc/Calc.java
similarity index 99%
rename from oysteikt-calc/src/main/java/app/Calc.java
rename to oysteikt-calc/src/main/java/oysteikt/calc/Calc.java
index f769f6f..cc90df3 100644
--- a/oysteikt-calc/src/main/java/app/Calc.java
+++ b/oysteikt-calc/src/main/java/oysteikt/calc/Calc.java
@@ -1,4 +1,4 @@
-package app;
+package oysteikt.calc;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/oysteikt-calc/src/main/java/app/App.java b/oysteikt-calc/src/main/java/oysteikt/calc/CalcApp.java
similarity index 84%
rename from oysteikt-calc/src/main/java/app/App.java
rename to oysteikt-calc/src/main/java/oysteikt/calc/CalcApp.java
index 4d2dc02..1fc4a92 100644
--- a/oysteikt-calc/src/main/java/app/App.java
+++ b/oysteikt-calc/src/main/java/oysteikt/calc/CalcApp.java
@@ -1,4 +1,4 @@
-package app;
+package oysteikt.calc;
 
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;
@@ -11,11 +11,11 @@ import java.io.IOException;
 /**
  * JavaFX App
  */
-public class App extends Application {
+public class CalcApp extends Application {
 
   @Override
   public void start(Stage stage) throws IOException {
-    FXMLLoader fxmlLoader = new FXMLLoader(this.getClass().getResource("App.fxml"));
+    FXMLLoader fxmlLoader = new FXMLLoader(this.getClass().getResource("Calc.fxml"));
     Parent parent = fxmlLoader.load();
     stage.setScene(new Scene(parent));
     stage.show();
diff --git a/oysteikt-calc/src/main/java/app/AppController.java b/oysteikt-calc/src/main/java/oysteikt/calc/CalcController.java
similarity index 96%
rename from oysteikt-calc/src/main/java/app/AppController.java
rename to oysteikt-calc/src/main/java/oysteikt/calc/CalcController.java
index e72afad..047b383 100644
--- a/oysteikt-calc/src/main/java/app/AppController.java
+++ b/oysteikt-calc/src/main/java/oysteikt/calc/CalcController.java
@@ -1,4 +1,4 @@
-package app;
+package oysteikt.calc;
 
 import java.util.List;
 import java.util.function.BinaryOperator;
@@ -10,11 +10,11 @@ import javafx.scene.control.Label;
 import javafx.scene.control.Labeled;
 import javafx.scene.control.ListView;
 
-public class AppController {
+public class CalcController {
 
   private Calc calc;
 
-  public AppController() {
+  public CalcController() {
     calc = new Calc(0.0, 0.0, 0.0);
   }
 
diff --git a/oysteikt-calc/src/main/resources/app/App.fxml b/oysteikt-calc/src/main/resources/oysteikt/calc/Calc.fxml
similarity index 97%
rename from oysteikt-calc/src/main/resources/app/App.fxml
rename to oysteikt-calc/src/main/resources/oysteikt/calc/Calc.fxml
index 5e9e25f..2fb7647 100644
--- a/oysteikt-calc/src/main/resources/app/App.fxml
+++ b/oysteikt-calc/src/main/resources/oysteikt/calc/Calc.fxml
@@ -5,7 +5,7 @@
 <?import javafx.scene.control.Button?>
 <?import javafx.scene.control.ListView?>
 
-<GridPane xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="app.AppController"
+<GridPane xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="oysteikt.calc.CalcController"
           alignment="CENTER" hgap="10.0" vgap="10.0" >
 
   <ListView fx:id="operandsView" prefHeight="80.0"
diff --git a/oysteikt-calc/src/test/java/app/AppTest.java b/oysteikt-calc/src/test/java/oysteikt/calc/CalcAppTest.java
similarity index 95%
rename from oysteikt-calc/src/test/java/app/AppTest.java
rename to oysteikt-calc/src/test/java/oysteikt/calc/CalcAppTest.java
index 96bfde2..fff0912 100644
--- a/oysteikt-calc/src/test/java/app/AppTest.java
+++ b/oysteikt-calc/src/test/java/oysteikt/calc/CalcAppTest.java
@@ -1,4 +1,4 @@
-package app;
+package oysteikt.calc;
 
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
@@ -6,6 +6,7 @@ import javafx.scene.Scene;
 import javafx.scene.control.Label;
 import javafx.scene.control.ListView;
 import javafx.stage.Stage;
+import oysteikt.calc.CalcController;
 
 import java.io.IOException;
 import java.util.List;
@@ -22,14 +23,14 @@ import org.testfx.matcher.control.LabeledMatchers;
 /**
  * TestFX App test
  */
-public class AppTest extends ApplicationTest {
+public class CalcAppTest extends ApplicationTest {
 
-  private AppController controller;
+  private CalcController controller;
   private Parent root;
 
   @Override
   public void start(Stage stage) throws IOException {
-    FXMLLoader fxmlLoader = new FXMLLoader(this.getClass().getResource("App.fxml"));
+    FXMLLoader fxmlLoader = new FXMLLoader(this.getClass().getResource("Calc.fxml"));
     root = fxmlLoader.load();
     controller = fxmlLoader.getController();
     stage.setScene(new Scene(root));
diff --git a/oysteikt-calc/src/test/java/app/CalcTest.java b/oysteikt-calc/src/test/java/oysteikt/calc/CalcTest.java
similarity index 99%
rename from oysteikt-calc/src/test/java/app/CalcTest.java
rename to oysteikt-calc/src/test/java/oysteikt/calc/CalcTest.java
index d6a9443..60ad5fd 100644
--- a/oysteikt-calc/src/test/java/app/CalcTest.java
+++ b/oysteikt-calc/src/test/java/oysteikt/calc/CalcTest.java
@@ -1,4 +1,4 @@
-package app;
+package oysteikt.calc;
 
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
diff --git a/oysteikt-calc/src/test/java/app/README.md b/oysteikt-calc/src/test/java/oysteikt/calc/README.md
similarity index 100%
rename from oysteikt-calc/src/test/java/app/README.md
rename to oysteikt-calc/src/test/java/oysteikt/calc/README.md