added comments

src/fi/utu/dtek1066/MapDialog.java

@@ -224,6 +224,7 @@ public class MapDialog extends JFrame {
       public void run() {
         URL url = null;
         try {
+          // TODO StringBuilder
           url = new URL("http://demo.mapserver.org/cgi-bin/wms?SERVICE="
               + "WMS&VERSION=1.1.1&REQUEST=GetMap&BBOX=" + MapDialog.this.westernLongitude + ","
               + MapDialog.this.southernLatitude + "," + MapDialog.this.easternLongitude + ","
@@ -235,12 +236,18 @@ public class MapDialog extends JFrame {
           e.printStackTrace();
         }
         MapDialog.this.imageLabel.setIcon(new ImageIcon(url));
-      }
+      } // run()
     }.start();
   } // updateImage()
 
-  private void populateLayerList()
-      throws ParserConfigurationException, SAXException, IOException, MalformedURLException {
+  /**
+   * Fetch the mapserver's capabilities and add their checkboxes to the left panel
+   *
+   * @throws ParserConfigurationException If the capability parser creation fails
+   * @throws SAXException If parsing the capabilities fails
+   * @throws IOException If any IO errors occur
+   */
+  private void populateLayerList() throws ParserConfigurationException, SAXException, IOException {
     DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
     DocumentBuilder parser = factory.newDocumentBuilder();
     Document document = parser.parse(new URL("http://demo.mapserver.org/cgi-bin/"
@@ -253,14 +260,22 @@ public class MapDialog extends JFrame {
       String title = layer.getElementsByTagName("Title").item(0).getTextContent();
       this.leftPanel.add(new LayerCheckBox(name, title, (i == 0) ? true : false));
     }
-  }
+  } // populateLayerList()
 
+  /**
+   * Updates the map focus coordinates according to the deltas provided.
+   *
+   * @param westDelta Difference in western longitude.
+   * @param eastDelta Difference in eastern longitude.
+   * @param southDelta Difference in southern latitude.
+   * @param northDelta Difference in northern latitude.
+   */
   private synchronized void updateCoordinates(int westDelta, int eastDelta, int southDelta,
       int northDelta) {
     this.westernLongitude += westDelta;
     this.easternLongitude += eastDelta;
     this.southernLatitude += southDelta;
     this.northernLatitude += northDelta;
-  }
+  } // updateCoordinates(int, int, int, int)
   // Käyttöliittymän komponentit
 } // MapDialog