diff --git a/app/src/main/java/br/org/cesar/discordtime/stickysessions/app/StickySessionApplication.java b/app/src/main/java/br/org/cesar/discordtime/stickysessions/app/StickySessionApplication.java
deleted file mode 100644
index f275b70e..00000000
--- a/app/src/main/java/br/org/cesar/discordtime/stickysessions/app/StickySessionApplication.java
+++ /dev/null
@@ -1,84 +0,0 @@
-package br.org.cesar.discordtime.stickysessions.app;
-
-import android.app.Application;
-
-import com.crashlytics.android.Crashlytics;
-
-import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerListSessionComponent;
-import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerLobbyComponent;
-import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerLoginComponent;
-import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerMeetingComponent;
-import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerSessionComponent;
-import br.org.cesar.discordtime.stickysessions.injectors.modules.ContextModule;
-import br.org.cesar.discordtime.stickysessions.ui.list.ListSessionsActivity;
-import br.org.cesar.discordtime.stickysessions.ui.lobby.LobbyActivity;
-import br.org.cesar.discordtime.stickysessions.ui.login.LoginActivity;
-import br.org.cesar.discordtime.stickysessions.ui.meeting.MeetingActivity;
-import br.org.cesar.discordtime.stickysessions.ui.session.SessionActivity;
-import io.fabric.sdk.android.Fabric;
-
-public class StickySessionApplication extends Application {
-
-    protected DaggerLoginComponent.Builder mLoginComponentBuilder;
-    protected DaggerLobbyComponent.Builder mLobbyComponentBuilder;
-    protected DaggerSessionComponent.Builder mSessionComponentBuilder;
-    protected DaggerListSessionComponent.Builder mSessionListBuilder;
-    protected DaggerMeetingComponent.Builder mMeetingComponentBuilder;
-
-    @Override
-    public void onCreate() {
-        super.onCreate();
-        configureLoginInjectorBuilder();
-        configureMainInjectorBuilder();
-        configureSessionInjectorBuilder();
-        configureSessionListInjectorBuilder();
-        configureMeetingInjectorBuilder();
-
-        Fabric.with(this, new Crashlytics());
-    }
-
-    protected void configureLoginInjectorBuilder() {
-        mLoginComponentBuilder = DaggerLoginComponent.builder();
-    }
-
-    protected void configureMainInjectorBuilder() {
-        mLobbyComponentBuilder = DaggerLobbyComponent.builder()
-                .contextModule(new ContextModule(getApplicationContext()));
-    }
-
-    protected void configureSessionInjectorBuilder() {
-        mSessionComponentBuilder = DaggerSessionComponent.builder()
-                .contextModule(new ContextModule(getApplicationContext()));
-    }
-
-    protected void configureSessionListInjectorBuilder() {
-        mSessionListBuilder = DaggerListSessionComponent.builder()
-                .contextModule(new ContextModule(getApplicationContext()));
-    }
-
-    protected void configureMeetingInjectorBuilder() {
-        mMeetingComponentBuilder = DaggerMeetingComponent.builder()
-                .contextModule(new ContextModule(getApplicationContext()));
-    }
-
-    public void inject(LoginActivity activity) {
-        mLoginComponentBuilder.build().inject(activity);
-    }
-
-    public void inject(LobbyActivity activity) {
-        mLobbyComponentBuilder.build().inject(activity);
-    }
-
-    public void inject(SessionActivity activity) {
-        mSessionComponentBuilder.build().inject(activity);
-    }
-
-    public void inject(ListSessionsActivity activity) {
-        mSessionListBuilder.build().inject(activity);
-    }
-
-    public void inject(MeetingActivity activity) {
-        mMeetingComponentBuilder.build().inject(activity);
-    }
-
-}
diff --git a/app/src/main/java/br/org/cesar/discordtime/stickysessions/app/StickySessionApplication.kt b/app/src/main/java/br/org/cesar/discordtime/stickysessions/app/StickySessionApplication.kt
new file mode 100644
index 00000000..0606cc78
--- /dev/null
+++ b/app/src/main/java/br/org/cesar/discordtime/stickysessions/app/StickySessionApplication.kt
@@ -0,0 +1,83 @@
+package br.org.cesar.discordtime.stickysessions.app
+
+import android.app.Application
+
+import com.crashlytics.android.Crashlytics
+
+import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerListSessionComponent
+import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerLobbyComponent
+import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerLoginComponent
+import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerMeetingComponent
+import br.org.cesar.discordtime.stickysessions.injectors.components.DaggerSessionComponent
+import br.org.cesar.discordtime.stickysessions.injectors.modules.ContextModule
+import br.org.cesar.discordtime.stickysessions.ui.list.ListSessionsActivity
+import br.org.cesar.discordtime.stickysessions.ui.lobby.LobbyActivity
+import br.org.cesar.discordtime.stickysessions.ui.login.LoginActivity
+import br.org.cesar.discordtime.stickysessions.ui.meeting.MeetingActivity
+import br.org.cesar.discordtime.stickysessions.ui.session.SessionActivity
+import io.fabric.sdk.android.Fabric
+
+open class StickySessionApplication : Application() {
+
+    protected var mLoginComponentBuilder: DaggerLoginComponent.Builder
+    protected var mLobbyComponentBuilder: DaggerLobbyComponent.Builder
+    protected var mSessionComponentBuilder: DaggerSessionComponent.Builder
+    protected var mSessionListBuilder: DaggerListSessionComponent.Builder
+    protected var mMeetingComponentBuilder: DaggerMeetingComponent.Builder
+
+    override fun onCreate() {
+        super.onCreate()
+        configureLoginInjectorBuilder()
+        configureMainInjectorBuilder()
+        configureSessionInjectorBuilder()
+        configureSessionListInjectorBuilder()
+        configureMeetingInjectorBuilder()
+
+        Fabric.with(this, Crashlytics())
+    }
+
+    protected fun configureLoginInjectorBuilder() {
+        mLoginComponentBuilder = DaggerLoginComponent.builder()
+    }
+
+    protected open fun configureMainInjectorBuilder() {
+        mLobbyComponentBuilder = DaggerLobbyComponent.builder()
+                .contextModule(ContextModule(applicationContext))
+    }
+
+    protected open fun configureSessionInjectorBuilder() {
+        mSessionComponentBuilder = DaggerSessionComponent.builder()
+                .contextModule(ContextModule(applicationContext))
+    }
+
+    protected open fun configureSessionListInjectorBuilder() {
+        mSessionListBuilder = DaggerListSessionComponent.builder()
+                .contextModule(ContextModule(applicationContext))
+    }
+
+    protected fun configureMeetingInjectorBuilder() {
+        mMeetingComponentBuilder = DaggerMeetingComponent.builder()
+                .contextModule(ContextModule(applicationContext))
+    }
+
+    fun inject(activity: LoginActivity) {
+        mLoginComponentBuilder.build().inject(activity)
+    }
+
+    fun inject(activity: LobbyActivity) {
+        mLobbyComponentBuilder.build().inject(activity)
+    }
+
+    fun inject(activity: SessionActivity) {
+        mSessionComponentBuilder.build().inject(activity)
+    }
+
+    fun inject(activity: ListSessionsActivity) {
+        mSessionListBuilder.build().inject(activity)
+    }
+
+    fun inject(activity: MeetingActivity) {
+        mMeetingComponentBuilder.build().inject(activity)
+    }
+
+}
diff --git a/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/remote/interceptor/HttpNetworkInterceptor.java b/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/remote/interceptor/HttpNetworkInterceptor.java
deleted file mode 100644
index f05bd89c..00000000
--- a/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/remote/interceptor/HttpNetworkInterceptor.java
+++ /dev/null
@@ -1,38 +0,0 @@
-package br.org.cesar.discordtime.stickysessions.data.remote.interceptor;
-
-import java.io.IOException;
-
-import br.org.cesar.discordtime.stickysessions.data.remote.wrapper.INetworkWrapper;
-import okhttp3.Interceptor;
-import okhttp3.Request;
-import okhttp3.Response;
-
-public class HttpNetworkInterceptor implements Interceptor {
-
-    private boolean local;
-    private INetworkWrapper mNetworkWrapper;
-
-    public HttpNetworkInterceptor(INetworkWrapper NetworkWrapper) {
-        mNetworkWrapper = NetworkWrapper;
-        local = false;
-    }
-
-    public void setLocal(boolean local){
-        this.local = local;
-    }
-
-    @Override
-    public Response intercept(Chain chain) throws IOException {
-        Request request = chain.request();
-        if(!local && !mNetworkWrapper.isConnected()){
-            new NoNetworkException();
-        }
-        return chain.proceed(request);
-    }
-
-    private class NoNetworkException {
-        public NoNetworkException(){
-            throw new RuntimeException("Please check Network Connection");
-        }
-    }
-}
diff --git a/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/remote/interceptor/HttpNetworkInterceptor.kt b/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/remote/interceptor/HttpNetworkInterceptor.kt
new file mode 100644
index 00000000..4dd3e58f
--- /dev/null
+++ b/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/remote/interceptor/HttpNetworkInterceptor.kt
@@ -0,0 +1,36 @@
+package br.org.cesar.discordtime.stickysessions.data.remote.interceptor
+
+import java.io.IOException
+
+import br.org.cesar.discordtime.stickysessions.data.remote.wrapper.INetworkWrapper
+import okhttp3.Interceptor
+import okhttp3.Request
+import okhttp3.Response
+
+class HttpNetworkInterceptor(private val mNetworkWrapper: INetworkWrapper) : Interceptor {
+
+    private var local: Boolean = false
+
+    init {
+        local = false
+    }
+
+    fun setLocal(local: Boolean) {
+        this.local = local
+    }
+
+    @Throws(IOException::class)
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val request = chain.request()
+        if (!local && !mNetworkWrapper.isConnected) {
+            NoNetworkException()
+        }
+        return chain.proceed(request)
+    }
+
+    private inner class NoNetworkException {
+        init {
+            throw RuntimeException("Please check Network Connection")
+        }
+    }
+}
diff --git a/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/repository/mapper/Mapper.java b/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/repository/mapper/Mapper.java
deleted file mode 100644
index 106bcce6..00000000
--- a/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/repository/mapper/Mapper.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package br.org.cesar.discordtime.stickysessions.data.repository.mapper;
-
-public interface Mapper<A, B> {
-
-    public B mapFromDomain(A domainType);
-    public A mapToDomain(B dataType);
-}
diff --git a/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/repository/mapper/Mapper.kt b/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/repository/mapper/Mapper.kt
new file mode 100644
index 00000000..b00c4411
--- /dev/null
+++ b/app/src/main/java/br/org/cesar/discordtime/stickysessions/data/repository/mapper/Mapper.kt
@@ -0,0 +1,7 @@
+package br.org.cesar.discordtime.stickysessions.data.repository.mapper
+
+interface Mapper<A, B> {
+
+    fun mapFromDomain(domainType: A): B
+    fun mapToDomain(dataType: B): A
+}