Fix various compiler warnings

Change-Id: I8e738009b44b802535b8c06db62d2cb219cf9dcf
Reviewed-on: http://gerrit.dmdirc.com/1857
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>

src/com/dmdirc/addons/ui_swing/components/addonbrowser/DataLoaderWorker.java

@@ -31,7 +31,6 @@ import com.dmdirc.util.InvalidConfigFileException;
 
 import java.io.File;
 import java.io.IOException;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Map;
@@ -75,9 +74,9 @@ public class DataLoaderWorker
         try {
             data.read();
         } catch (IOException ex) {
-            return Arrays.asList(Collections.<String, String>emptyMap());
+            return Collections.<Map<String, String>>emptyList();
         } catch (InvalidConfigFileException ex) {
-            return Arrays.asList(Collections.<String, String>emptyMap());
+            return Collections.<Map<String, String>>emptyList();
         }
         return data.getKeyDomains().values();
     }
@@ -92,10 +91,10 @@ public class DataLoaderWorker
         try {
             data = get();
         } catch (InterruptedException ex) {
-            data = Arrays.asList(Collections.<String, String>emptyMap());
+            data = Collections.<Map<String, String>>emptyList();
         } catch (ExecutionException ex) {
             Logger.appError(ErrorLevel.MEDIUM, ex.getMessage(), ex);
-            data = Arrays.asList(Collections.<String, String>emptyMap());
+            data = Collections.<Map<String, String>>emptyList();
         }
         final int selectedRow;
         if (table.getRowCount() > 0 && table.getSelectedRow() > 0) {

src/com/dmdirc/addons/ui_swing/components/expandingsettings/CurrentOptionsPanel.java

@@ -100,6 +100,7 @@ public final class CurrentOptionsPanel extends JPanel implements
 
     /**
      * Adds an option to the current options pane.
+     * 
      * @param configName config option name
      * @param displayName config option display name
      * @param panel parent panel
@@ -107,7 +108,7 @@ public final class CurrentOptionsPanel extends JPanel implements
      */
     private void addCurrentOption(final JComponent component) {
         final JLabel label = new JLabel();
-        final ImageButton<JComponent> button = new ImageButton(
+        final ImageButton<JComponent> button = new ImageButton<JComponent>(
                 component.getName(),
                 IconManager.getIconManager().getIcon("close-inactive"),
                 IconManager.getIconManager().getIcon("close-active"));
@@ -145,6 +146,7 @@ public final class CurrentOptionsPanel extends JPanel implements
      * @param e Action performed
      */
     @Override
+    @SuppressWarnings("unchecked")
     public void actionPerformed(final ActionEvent e) {
         final JComponent setting = ((ImageButton<JComponent>)
                 e.getSource()).getObject();