diff --git a/todolist/core/src/test/java/todolist/json/TodoModuleTest.java b/todolist/core/src/test/java/todolist/json/TodoModuleTest.java
index cda1436fb621f26205b20e743e18cd254bebad4d..88248d6ad938876f72aa27715e77d9a570679055 100644
--- a/todolist/core/src/test/java/todolist/json/TodoModuleTest.java
+++ b/todolist/core/src/test/java/todolist/json/TodoModuleTest.java
@@ -27,7 +27,26 @@ public class TodoModuleTest {
     mapper.registerModule(new TodoModule());
   }
 
-  private final static String todoListWithTwoItems = "{\"lists\":[{\"name\":\"todo\",\"items\":[{\"text\":\"item1\",\"checked\":false},{\"text\":\"item2\",\"checked\":true,\"deadline\":\"2020-10-01T14:53:11\"}]}]}";
+  private final static String todoListWithTwoItems = """
+    {
+      "lists": [
+        {
+          "name": "todo",
+          "items": [
+            {
+              "text": "item1",
+              "checked": false
+            },
+            {
+              "text": "item2",
+              "checked": true,
+              "deadline": "2020-10-01T14:53:11"
+            }
+          ]
+        }
+      ]
+    }
+    """;
 
   @Test
   public void testSerializers() {
diff --git a/todolist/fxui/pom.xml b/todolist/fxui/pom.xml
index 0b7d7998c8a217e292edc33565ea6647c0e8991c..70d43d8e329e36d58a6377b6ebca7783f8d1b640 100644
--- a/todolist/fxui/pom.xml
+++ b/todolist/fxui/pom.xml
@@ -93,7 +93,7 @@
                     <plugin>
                         <groupId>org.openjfx</groupId>
                         <artifactId>javafx-maven-plugin</artifactId>
-                        <version>0.0.5</version>
+                        <version>0.0.6</version>
                         <configuration>                    
                             <mainClass>de.jensd.fx.glyphs.fontawesome.demo.FontAwesomeIconsDemoApp</mainClass>
                         </configuration>
@@ -108,7 +108,7 @@
                     <plugin>
                         <groupId>org.openjfx</groupId>
                         <artifactId>javafx-maven-plugin</artifactId>
-                        <version>0.0.5</version>
+                        <version>0.0.6</version>
                         <configuration>                    
                             <mainClass>todolist.ui.TodoDocumentApp</mainClass>
                         </configuration>
@@ -123,7 +123,7 @@
                     <plugin>
                         <groupId>org.openjfx</groupId>
                         <artifactId>javafx-maven-plugin</artifactId>
-                        <version>0.0.5</version>
+                        <version>0.0.6</version>
                         <configuration>                    
                             <mainClass>todolist.ui.TodoRemoteApp</mainClass>
                         </configuration>
@@ -177,7 +177,7 @@
             <plugin>
                 <groupId>org.openjfx</groupId>
                 <artifactId>javafx-maven-plugin</artifactId>
-                <version>0.0.5</version>
+                <version>0.0.6</version>
                 <configuration>
                     <mainClass>todolist.ui.TodoApp</mainClass>
                 </configuration>
diff --git a/todolist/fxutil/src/main/java/fxutil/doc/DocumentPersistence.java b/todolist/fxutil/src/main/java/fxutil/doc/DocumentPersistence.java
index 3b879ae8ac51b118ee707cd1c30c8bebb66358be..63c80dc093b7ed79a15e3ecd9b22c3f65028c99a 100644
--- a/todolist/fxutil/src/main/java/fxutil/doc/DocumentPersistence.java
+++ b/todolist/fxutil/src/main/java/fxutil/doc/DocumentPersistence.java
@@ -4,8 +4,8 @@ package fxutil.doc;
  * Interface for the documents that can be loaded and saved,
  * so they can support the operations of a file menu.
  *
- * @param <D>
- * @param <L>
+ * @param <D> The type of the document content
+ * @param <L> The type of the location
  */
 public interface DocumentPersistence<D, L> extends DocumentLoader<D>, DocumentSaver<D, L> {
 }
diff --git a/todolist/fxutil/src/main/java/fxutil/doc/FileMenuController.java b/todolist/fxutil/src/main/java/fxutil/doc/FileMenuController.java
index bbc8aba0cddccd5c1cf57266923f52a0a9518ff4..d00c1c7ceb76e452c78702ca6af2216af8fe52a2 100644
--- a/todolist/fxutil/src/main/java/fxutil/doc/FileMenuController.java
+++ b/todolist/fxutil/src/main/java/fxutil/doc/FileMenuController.java
@@ -24,7 +24,7 @@ import javafx.scene.control.TextInputDialog;
 import javafx.stage.FileChooser;
 
 /**
- * Controller for the file menu
+ * Controller for the file menu.
  */
 public class FileMenuController {
 
diff --git a/todolist/pom.xml b/todolist/pom.xml
index 6d85b399760a4aebd180cb6b9624156926efcf9d..d1cfc40e2d27136cbb5882a9a97150be852fdd34 100644
--- a/todolist/pom.xml
+++ b/todolist/pom.xml
@@ -66,7 +66,7 @@
                     <version>3.8.1</version>
                     <configuration>
                         <encoding>UTF-8</encoding>
-                        <release>14</release>
+                        <release>16</release>
                     </configuration>
                 </plugin>
                 <plugin>