diff --git a/base/src/main/java/de/staropensource/engine/base/utility/misc/ArrayUtil.java b/base/src/main/java/de/staropensource/engine/base/utility/misc/ArrayUtil.java
index aa52f27..c732fc7 100644
--- a/base/src/main/java/de/staropensource/engine/base/utility/misc/ArrayUtil.java
+++ b/base/src/main/java/de/staropensource/engine/base/utility/misc/ArrayUtil.java
@@ -31,6 +31,14 @@ import java.util.Collections;
  * @since v1-alpha9
  */
 public final class ArrayUtil {
+    /**
+     * Creates and initializes an
+     * instance of this class.
+     *
+     * @since v1-alpha9
+     */
+    private ArrayUtil() {}
+
     /**
      * Removes the first {@code n} elements
      * from the specified array.
@@ -40,6 +48,7 @@ public final class ArrayUtil {
      * specified array, an empty array
      * will be returned.
      *
+     * @param <T>   type
      * @param array array to operate on
      * @param n     amount to remove
      * @return array with the first elements removed
@@ -62,6 +71,7 @@ public final class ArrayUtil {
      * specified array, an empty array
      * will be returned.
      *
+     * @param <T>   type
      * @param array array to operate on
      * @param n     amount to remove
      * @return array with the last elements removed
diff --git a/base/src/main/java/de/staropensource/engine/base/utility/misc/StringUtil.java b/base/src/main/java/de/staropensource/engine/base/utility/misc/StringUtil.java
index cd2a380..292eecc 100644
--- a/base/src/main/java/de/staropensource/engine/base/utility/misc/StringUtil.java
+++ b/base/src/main/java/de/staropensource/engine/base/utility/misc/StringUtil.java
@@ -28,6 +28,14 @@ import org.jetbrains.annotations.Nullable;
  * @since v1-alpha9
  */
 public final class StringUtil {
+    /**
+     * Creates and initializes an
+     * instance of this class.
+     *
+     * @since v1-alpha9
+     */
+    private StringUtil() {}
+
     /**
      * Counts the number of occurrences of the specified substring inside the specified string.
      *
diff --git a/base/src/main/java/de/staropensource/engine/base/utility/misc/TypeConversion.java b/base/src/main/java/de/staropensource/engine/base/utility/misc/TypeConversion.java
index eed2050..d227f77 100644
--- a/base/src/main/java/de/staropensource/engine/base/utility/misc/TypeConversion.java
+++ b/base/src/main/java/de/staropensource/engine/base/utility/misc/TypeConversion.java
@@ -28,6 +28,14 @@ import org.jetbrains.annotations.Range;
  * @since v1-alpha9
  */
 public final class TypeConversion {
+    /**
+     * Creates and initializes an
+     * instance of this class.
+     *
+     * @since v1-alpha9
+     */
+    private TypeConversion() {}
+
     /**
      * Converts a boolean into an integer.
      *
diff --git a/rendering/src/main/java/de/staropensource/engine/rendering/renderer/Renderer.java b/rendering/src/main/java/de/staropensource/engine/rendering/renderer/Renderer.java
index a640d19..10e869b 100644
--- a/rendering/src/main/java/de/staropensource/engine/rendering/renderer/Renderer.java
+++ b/rendering/src/main/java/de/staropensource/engine/rendering/renderer/Renderer.java
@@ -214,6 +214,14 @@ public final class Renderer {
 
 
     // ----> Initialization
+    /**
+     * Creates and initializes an
+     * instance of this class.
+     *
+     * @since v1-alpha9
+     */
+    private Renderer() {}
+
     /**
      * Initializes the renderer.
      *
diff --git a/rendering/src/main/java/de/staropensource/engine/rendering/type/Window.java b/rendering/src/main/java/de/staropensource/engine/rendering/type/Window.java
index ed6b7f7..22cb45d 100644
--- a/rendering/src/main/java/de/staropensource/engine/rendering/type/Window.java
+++ b/rendering/src/main/java/de/staropensource/engine/rendering/type/Window.java
@@ -389,6 +389,7 @@ public final class Window implements Closeable {
      *
      * @since v1-alpha9
      */
+    @Getter(value = AccessLevel.NONE)
     private GLFWKeyCallback keyCallback;
 
     /**
@@ -397,6 +398,7 @@ public final class Window implements Closeable {
      *
      * @since v1-alpha9
      */
+    @Getter(value = AccessLevel.NONE)
     private GLFWMouseButtonCallback mouseButtonCallback;
 
 
@@ -503,7 +505,7 @@ public final class Window implements Closeable {
         glfwWindowHintString(GLFW_X11_INSTANCE_NAME, name);
 
         // Create window
-        internalWindowIdentifier = glfwCreateWindow(1, 1, "", NULL, NULL);
+        internalWindowIdentifier = glfwCreateWindow(size.getX(), size.getY(), "", NULL, NULL);
         if (internalWindowIdentifier == NULL)
             throw new WindowCreationFailureException();
 
@@ -655,7 +657,9 @@ public final class Window implements Closeable {
             if (queuedPropertyUpdates.containsKey("size")) {
                 width.put(((Vec2i) queuedPropertyUpdates.get("size")).getX());
                 height.put(((Vec2i) queuedPropertyUpdates.get("size")).getY());
-                glfwSetWindowSize(internalWindowIdentifier, width.get(), height.get());
+                // TODO
+                if (!fresh)
+                    glfwSetWindowSize(internalWindowIdentifier, width.get(), height.get());
             } else {
                 glfwGetWindowSize(internalWindowIdentifier, width, height);
                 size = new Vec2i(width.get(), height.get());
@@ -924,6 +928,7 @@ public final class Window implements Closeable {
      * @param size new size
      * @since v1-alpha9
      */
+    @ApiStatus.Experimental
     public void setSize(@NotNull Vec2i size) {
         // Ensure the window is not terminated
         if (terminated)
@@ -977,6 +982,7 @@ public final class Window implements Closeable {
      * @param position new position
      * @since v1-alpha9
      */
+    @ApiStatus.Experimental
     public void setPosition(@NotNull Vec2i position) {
         // Ensure the window is not terminated
         if (isTerminated())