OSGi using guice

Main.java

package org.heater.core;

import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;
import org.apache.felix.framework.Felix;
import org.heater.api.HeaterActivator;
import org.heater.gui.GuiModule;
import org.heater.gui.HeaterFrame;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleException;
import org.osgi.framework.Constants;

import javax.swing.*;
import java.awt.*;
import java.io.File;
import java.nio.file.Files;
import java.util.HashMap;
import java.util.Map;

public class Main {
    public static void main(String[] args) {
        //trying to set the default looking of system
        etablishingLookAndFeel();

        //Initializing plugin handler
        Map<String, String> properties = new HashMap<>();
        properties.put(Constants.FRAMEWORK_STORAGE_CLEAN_ONFIRSTINIT, "firstInit");
        Felix felix = new Felix(properties);

        final Injector injector;
        try {
            felix.start();
            File[] files = new File("plugins").listFiles();
            Map<HeaterActivator, AbstractModule> modules = new HashMap<>();

            for(File file: files) {
                Bundle bundle = felix.getBundleContext().installBundle(file.getAbsolutePath());
                HeaterActivator activator = (HeaterActivator) bundle.loadClass(bundle.getBundleContext().getProperty("plugin")).newInstance();
                modules.put(activator, activator.pluginModule());
            }
            modules.put(null, new DefaultModule());
            modules.put(null, new GuiModule());


            injector = Guice.createInjector(modules.values());

            for(HeaterActivator activator: modules.keySet())
                if(activator != null)
                    injector.injectMembers(activator);

            //launching gui
            EventQueue.invokeLater(() -> {
                //initializing frame
                injector.getInstance(HeaterFrame.class).initialize().setVisible(true);

                //initializing logger dialog
                injector.getInstance(Logger.class).initialize();
            });

        } catch (Exception e) {}
    }

    private static void etablishingLookAndFeel() {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch(Exception e) {}
    }
}