Created buffered Reader, edited it so that it uses the first two parts of a line to determine which section it is to be in.

src/main/java/cvbuilder/view/MainViewer.java

@@ -12,17 +12,22 @@ public class MainViewer {
     public MainViewer() {
         userGroup = UserGroup.getInstance();
 
+        // Create the main frame
         JFrame viewer = new JFrame("CV Builder");
         viewer.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         viewer.setSize(800, 500);
-        viewer.setVisible(true);
 
+        // Create menu bar
         JMenuBar menuBar = new JMenuBar();
-        JMenu menu = new JMenu("File");
+        JMenu menu = new JMenu("Menu");
         menuBar.add(menu);
         viewer.setJMenuBar(menuBar);
 
+        // Add content to the frame
         populateMainPanel(viewer);
+
+        // Make the frame visible after all content is added
+        viewer.setVisible(true);
     }
 
     public void populateMainPanel(JFrame viewer) {
@@ -60,7 +65,8 @@ public class MainViewer {
         contactT.addTab("Address", address);
         outer.addTab("Contact", contactT);
 
-        viewer.add(outer);
+        viewer.getContentPane().add(outer);
+        viewer.revalidate();
     }
 
     private void populatePanel(JPanel panel) {
@@ -68,14 +74,18 @@ public class MainViewer {
         ButtonGroup group = new ButtonGroup();
         String panelName = panel.getName();
 
+        if (userGroup.getUsers().isEmpty()) {
+            panel.add(new JLabel("No users available"));
+            return;
+        }
+
         for (User user : userGroup.getUsers()) {
-            JRadioButton radioButton = new JRadioButton(user.getUserAttribute(panelName));
-            group.add(radioButton);
-            panel.add(radioButton);
+            String value = user.getUserAttribute(panelName);
+            if (value != null && !value.isEmpty()) {
+                JRadioButton radioButton = new JRadioButton(value);
+                group.add(radioButton);
+                panel.add(radioButton);
+            }
         }
     }
-
-    public static void main(String[] args) {
-        SwingUtilities.invokeLater(MainViewer::new);
-    }
 }