diff --git a/config/checkstyle/suppressions.xml b/config/checkstyle/suppressions.xml
index 1a8371f..83e4a8c 100644
--- a/config/checkstyle/suppressions.xml
+++ b/config/checkstyle/suppressions.xml
@@ -12,4 +12,5 @@
     <suppress checks="ParameterNumber" files="[\\/]imgui[\\/]"/>
     <suppress checks="FileLength" files="[\\/]imgui[\\/]"/>
     <suppress checks="FinalParameters" files="ImGui.java"/>
+    <suppress checks="DesignForExtension" files="[\\/]imgui[\\/]app[\\/]"/>
 </suppressions>
diff --git a/imgui-app/build.gradle b/imgui-app/build.gradle
index c41c321..e09e4c5 100644
--- a/imgui-app/build.gradle
+++ b/imgui-app/build.gradle
@@ -1,6 +1,5 @@
 plugins {
     id 'java-library'
-    id 'io.freefair.lombok' version '6.0.0-m2'
     id 'checkstyle'
     id 'maven-publish'
     id 'signing'
diff --git a/imgui-app/lombok.config b/imgui-app/lombok.config
deleted file mode 100644
index 6aa51d7..0000000
--- a/imgui-app/lombok.config
+++ /dev/null
@@ -1,2 +0,0 @@
-# This file is generated by the 'io.freefair.lombok' Gradle plugin
-config.stopBubbling = true
diff --git a/imgui-app/src/main/java/imgui/app/Color.java b/imgui-app/src/main/java/imgui/app/Color.java
index 33cb78a..b77cc75 100644
--- a/imgui-app/src/main/java/imgui/app/Color.java
+++ b/imgui-app/src/main/java/imgui/app/Color.java
@@ -1,16 +1,16 @@
 package imgui.app;
 
-import lombok.Data;
-import lombok.NoArgsConstructor;
+import java.util.Arrays;
 
 /**
  * Object for color data.
  */
-@Data
-@NoArgsConstructor
 public class Color implements Cloneable {
     private final float[] data = new float[4];
 
+    public Color() {
+    }
+
     public Color(final float[] color) {
         set(color);
     }
@@ -49,6 +49,30 @@ public class Color implements Cloneable {
         return data[3];
     }
 
+    @Override
+    public boolean equals(final Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        final Color color = (Color) o;
+        return Arrays.equals(data, color.data);
+    }
+
+    @Override
+    public int hashCode() {
+        return Arrays.hashCode(data);
+    }
+
+    @Override
+    public String toString() {
+        return "Color{"
+            + "data=" + Arrays.toString(data)
+            + '}';
+    }
+
     /**
      * Method to clone Color instance.
      *
diff --git a/imgui-app/src/main/java/imgui/app/Configuration.java b/imgui-app/src/main/java/imgui/app/Configuration.java
index 3692504..4c52a0e 100644
--- a/imgui-app/src/main/java/imgui/app/Configuration.java
+++ b/imgui-app/src/main/java/imgui/app/Configuration.java
@@ -1,11 +1,8 @@
 package imgui.app;
 
-import lombok.Data;
-
 /**
  * Data class to provide basic information about the window. Like, the title name etc.
  */
-@Data
 public class Configuration {
     /**
      * Application title.
@@ -23,4 +20,36 @@ public class Configuration {
      * When true, application will be maximized by default.
      */
     private boolean fullScreen = false;
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(final String title) {
+        this.title = title;
+    }
+
+    public int getWidth() {
+        return width;
+    }
+
+    public void setWidth(final int width) {
+        this.width = width;
+    }
+
+    public int getHeight() {
+        return height;
+    }
+
+    public void setHeight(final int height) {
+        this.height = height;
+    }
+
+    public boolean isFullScreen() {
+        return fullScreen;
+    }
+
+    public void setFullScreen(final boolean fullScreen) {
+        this.fullScreen = fullScreen;
+    }
 }
diff --git a/imgui-app/src/main/java/imgui/app/Window.java b/imgui-app/src/main/java/imgui/app/Window.java
index 7b95253..166b2e6 100644
--- a/imgui-app/src/main/java/imgui/app/Window.java
+++ b/imgui-app/src/main/java/imgui/app/Window.java
@@ -42,7 +42,7 @@ public abstract class Window {
      *
      * @param config configuration object with basic window information
      */
-    protected final void init(final Configuration config) {
+    protected void init(final Configuration config) {
         initWindow(config);
         initImGui(config);
         imGuiGlfw.init(handle, true);
@@ -52,7 +52,7 @@ public abstract class Window {
     /**
      * Method to dispose all used application resources and destroy its window.
      */
-    protected final void dispose() {
+    protected void dispose() {
         imGuiGl3.dispose();
         imGuiGlfw.dispose();
         disposeImGui();
@@ -139,7 +139,7 @@ public abstract class Window {
     /**
      * Main application loop.
      */
-    protected final void run() {
+    protected void run() {
         while (!GLFW.glfwWindowShouldClose(handle)) {
             startFrame();
             preProcess();