added some documentation

src/main/java/de/neemann/gui/ConfirmDialogBuilder.java

@@ -98,15 +98,19 @@ public class ConfirmDialogBuilder {
      */
     public int show(Component parent) {
         Object[] options;
-        if (cancle == null)
+        int optionType;
+        if (cancle == null) {
             options = new Object[]{yes, no};
-        else
+            optionType = JOptionPane.YES_NO_OPTION;
+        } else {
             options = new Object[]{yes, no, cancle};
+            optionType = JOptionPane.YES_NO_CANCEL_OPTION;
+        }
 
         return JOptionPane.showOptionDialog(parent,
                 message,
                 title,
-                cancle == null ? JOptionPane.YES_NO_OPTION : JOptionPane.YES_NO_CANCEL_OPTION,
+                optionType,
                 JOptionPane.QUESTION_MESSAGE,
                 null,
                 options,

src/main/java/de/neemann/gui/ErrorMessage.java

@@ -4,21 +4,38 @@ import javax.swing.*;
 import java.awt.*;
 
 /**
- * Created by hneemann on 09.02.14.
+ * Used to show error messages.
+ * Implements runnable so you can apply this class directly to {@link SwingUtilities#invokeLater(Runnable)}
+ *
+ * @author hneemann on 09.02.14.
  */
 public class ErrorMessage implements Runnable {
 
     private final StringBuilder message;
     private Component component;
 
+    /**
+     * Creates a new instance
+     */
     public ErrorMessage() {
         this("");
     }
 
+    /**
+     * Creates anew instance
+     *
+     * @param message the message to show
+     */
     public ErrorMessage(String message) {
         this.message = new StringBuilder(message);
     }
 
+    /**
+     * Adds a cause to the message
+     *
+     * @param e the cause
+     * @return this for call chaining
+     */
     public ErrorMessage addCause(Throwable e) {
         e.printStackTrace();
 
@@ -28,15 +45,33 @@ public class ErrorMessage implements Runnable {
         return this;
     }
 
+    /**
+     * Shows the error message
+     *
+     * @return this for call chaining
+     */
     public ErrorMessage show() {
         return show(null);
     }
 
+    /**
+     * Shows the error message
+     *
+     * @param parent the parent
+     * @return this for call chaining
+     */
     public ErrorMessage show(Component parent) {
         JOptionPane.showMessageDialog(parent, message.toString(), "Error", JOptionPane.ERROR_MESSAGE);
         return this;
     }
 
+    /**
+     * Sets a parents component.
+     * Used if supplied to {@link SwingUtilities#invokeLater(Runnable)}
+     *
+     * @param component the parent
+     * @return this for call chaining
+     */
     public ErrorMessage setComponent(Component component) {
         this.component = component;
         return this;

src/main/java/de/neemann/gui/InfoDialog.java

@@ -98,7 +98,7 @@ public final class InfoDialog {
         private final HashMap<String, String> manifest;
         private final URL url;
 
-        public Manifest(URL url) throws IOException {
+        Manifest(URL url) throws IOException {
             this.url = url;
             manifest = new HashMap<String, String>();
             BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream(), "UTF-8"));
@@ -135,10 +135,9 @@ public final class InfoDialog {
 
         @Override
         public String toString() {
-            return "Manifest{" +
-                    "manifest=" + manifest +
-                    ", url=" + url +
-                    '}';
+            return "Manifest{"
+                    + "manifest=" + manifest
+                    + ", url=" + url + '}';
         }
     }
 }

src/main/java/de/neemann/gui/StringUtils.java

@@ -1,9 +1,20 @@
 package de.neemann.gui;
 
 /**
+ * Some helper functions concerning strings
  */
-public class StringUtils {
+public final class StringUtils {
 
+    private StringUtils() {
+    }
+
+    /**
+     * Adds a list to a {@link StringBuilder}
+     *
+     * @param sb        the StringBuilder
+     * @param i         the list
+     * @param separator the separator to use
+     */
     public static void addList(StringBuilder sb, Iterable<?> i, String separator) {
         boolean first = true;
         for (Object o : i) {
@@ -15,6 +26,12 @@ public class StringUtils {
         }
     }
 
+    /**
+     * Creates a exception message
+     *
+     * @param e the {@link Throwable} instance
+     * @return the message
+     */
     public static String getExceptionMessage(Throwable e) {
         StringBuilder sb = new StringBuilder();
 

src/main/java/de/neemann/gui/ToolTipAction.java

@@ -4,31 +4,58 @@ import javax.swing.*;
 import java.awt.*;
 
 /**
- * Created by hneemann on 06.03.15.
+ * Action to handle tool tips.
+ * C@author hneemann on 06.03.15.
  */
 public abstract class ToolTipAction extends AbstractAction {
     private Icon icon;
     private String toolTipText;
 
+    /**
+     * Creates a new instance
+     *
+     * @param name the name of the action
+     */
     public ToolTipAction(String name) {
         super(name);
     }
 
+    /**
+     * Creates a new instance
+     *
+     * @param name the name of the action
+     * @param icon the icon
+     */
     public ToolTipAction(String name, Icon icon) {
         super(name, icon);
         this.icon = icon;
     }
 
+    /**
+     * Sets the tool tip text
+     *
+     * @param text the tool tip text
+     * @return this for call chaining
+     */
     public ToolTipAction setToolTip(String text) {
         this.toolTipText = text;
         return this;
     }
 
+    /**
+     * Sets the activated state for this action
+     *
+     * @param newValue the new state
+     * @return this for call chaining
+     */
     public ToolTipAction setActive(boolean newValue) {
         super.setEnabled(newValue);
         return this;
     }
 
+    /**
+     * @return a JButton associated with this action
+     */
     public JButton createJButton() {
         JButton b = new JButton(this);
         if (toolTipText != null) {
@@ -37,6 +64,9 @@ public abstract class ToolTipAction extends AbstractAction {
         return b;
     }
 
+    /**
+     * @return a JButton associated with this action, contains only the icon
+     */
     public JButton createJButtonNoText() {
         JButton b = new JButton(this);
         if (toolTipText != null) {
@@ -48,12 +78,18 @@ public abstract class ToolTipAction extends AbstractAction {
         return b;
     }
 
+    /**
+     * @return a JButton associated with this action, contains only the icon
+     */
     public JButton createJButtonNoTextSmall() {
         JButton b = createJButtonNoText();
         b.setPreferredSize(new Dimension(icon.getIconWidth() + 4, icon.getIconHeight() + 4));
         return b;
     }
 
+    /**
+     * @return a JMenuItem associated with this action
+     */
     public JMenuItem createJMenuItem() {
         JMenuItem i = new JMenuItem(this);
         if (toolTipText != null) {
@@ -62,6 +98,9 @@ public abstract class ToolTipAction extends AbstractAction {
         return i;
     }
 
+    /**
+     * @return a JMenuItem associated with this action, contains no icon
+     */
     public JMenuItem createJMenuItemNoIcon() {
         JMenuItem i = createJMenuItem();
         i.setIcon(null);