New application for I2P: desktopgui. Should eventually replace systray, and have more functionality.

To use the application, you need to (by default) add the following to clients.config :
# desktopgui
clientApp.6.args=
clientApp.6.delay=5
clientApp.6.main=desktopgui.Main
clientApp.6.name=desktopgui
clientApp.6.startOnLoad=true

apps/desktopgui/src/persistence/PropertyManager.java

@@ -0,0 +1,72 @@
+package persistence;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.Properties;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ *
+ * @author mathias
+ */
+public class PropertyManager {
+    
+    public static void setProps(Properties props) {
+        PropertyManager.props = props;
+    }
+    
+    public static Properties getProps() {
+        return props;
+    }
+    
+    public static Properties loadProps() {
+        Properties defaultProps = new Properties();
+        defaultProps.setProperty("firstLoad", "true");
+
+        // create application properties with default
+        Properties applicationProps = new Properties(defaultProps);
+
+        // now load properties from last invocation
+        FileInputStream in;
+        try {
+            in = new FileInputStream(PROPSLOCATION);
+            applicationProps.load(in);
+            in.close();
+        } catch (FileNotFoundException ex) {
+            //Nothing serious, just means it's being loaded for the first time.
+        } catch(IOException ex) {
+            Logger.getLogger(PropertyManager.class.getName()).log(Level.INFO, null, ex);
+        }
+        props = applicationProps;
+        return applicationProps;
+    }
+    
+    public static void saveProps(Properties props) {
+        FileOutputStream out;
+        try {
+            File d = new File(PROPSDIRECTORY);
+            if(!d.exists())
+                d.mkdir();
+            File f = new File(PROPSLOCATION);
+            if(!f.exists())
+                f.createNewFile();
+            out = new FileOutputStream(f);
+            props.store(out, PROPSLOCATION);
+        } catch (FileNotFoundException ex) {
+            Logger.getLogger(PropertyManager.class.getName()).log(Level.SEVERE, null, ex);
+        } catch(IOException ex) {
+            Logger.getLogger(PropertyManager.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }
+    
+    private static Properties props;
+    
+    ///Location where we store the Application Properties
+    public static final String PROPSDIRECTORY = "desktopgui";
+    public static final String PROPSFILENAME = "appProperties";
+    public static final String PROPSLOCATION = PROPSDIRECTORY + File.separator + PROPSFILENAME;
+}