diff --git a/graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/OpenGlManagement.java b/graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/OpenGlManagement.java
index 157e4fa..3ec7813 100644
--- a/graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/OpenGlManagement.java
+++ b/graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/OpenGlManagement.java
@@ -30,7 +30,7 @@ import org.jetbrains.annotations.NotNull;
  * @since 1-alpha0
  */
 @SuppressWarnings({ "unused" })
-public class OpenGlManagement implements ApiManagementClass {
+public final class OpenGlManagement implements ApiManagementClass {
     /** {@inheritDoc} */
     @NotNull
     @Override
diff --git a/graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/OpenGlSubsystem.java b/graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/OpenGlSubsystem.java
index ef5a4cd..7f1d97b 100644
--- a/graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/OpenGlSubsystem.java
+++ b/graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/OpenGlSubsystem.java
@@ -21,12 +21,14 @@ package de.staropensource.sosengine.graphics.opengl;
 
 import de.staropensource.sosengine.base.annotations.EventListener;
 import de.staropensource.sosengine.base.classes.EventPriority;
+import de.staropensource.sosengine.base.classes.helpers.EventHelper;
 import de.staropensource.sosengine.base.logging.LoggerInstance;
 import de.staropensource.sosengine.base.types.LogIssuer;
 import de.staropensource.sosengine.base.utility.Miscellaneous;
 import de.staropensource.sosengine.graphics.GraphicsSubsystem;
 import de.staropensource.sosengine.graphics.classes.ApiMainClass;
 import de.staropensource.sosengine.graphics.classes.ApiManagementClass;
+import de.staropensource.sosengine.graphics.events.GraphicsApiErrorEvent;
 import de.staropensource.sosengine.graphics.opengl.events.GraphicsErrorEvent;
 import lombok.Getter;
 import org.lwjgl.glfw.GLFWErrorCallback;
@@ -88,10 +90,15 @@ public final class OpenGlSubsystem implements ApiMainClass {
             instance.logger.crash("The subsystem tried to initialize twice");
         }
 
-        // Register Graphics API
-        GraphicsSubsystem.getInstance().registerGraphicsApi(this);
+        long initTime = Miscellaneous.measureExecutionTime(() -> {
+            // Precompute event listeners
+            EventHelper.precomputeEventListeners(GraphicsErrorEvent.class);
 
-        logger.info("Initialized subsystem");
+            // Register Graphics API
+            GraphicsSubsystem.getInstance().registerGraphicsApi(this);
+        });
+
+        logger.info("Initialized subsystem in " + initTime + "ms");
     }
 
     /** {@inheritDoc} */
@@ -140,14 +147,25 @@ public final class OpenGlSubsystem implements ApiMainClass {
     }
 
     /**
-     * Called when a graphics error occurs. This method just logs the error and returns.
+     * Called when an OpenGL error occurs. This method just logs the error and returns.
      *
      * @param error graphics error
      * @since 1-alpha0
      */
     @EventListener(event = GraphicsErrorEvent.class, priority = EventPriority.EXTREMELY_IMPORTANT)
     public static void onGraphicsError(String error) {
-        instance.logger.error("An error occurred: " + error);
+        instance.logger.error("OpenGL returned an error: " + error);
+    }
+
+    /**
+     * Called when a Graphics API error occurs. This method just logs the error and returns.
+     *
+     * @param error Graphics API error
+     * @since 1-alpha0
+     */
+    @EventListener(event = GraphicsApiErrorEvent.class, priority = EventPriority.EXTREMELY_IMPORTANT)
+    public static void onGraphicsApiError(String error) {
+        instance.logger.error("Graphics API returned an error: " + error);
     }
 
     /**
diff --git a/graphics/src/main/java/de/staropensource/sosengine/graphics/GraphicsSubsystem.java b/graphics/src/main/java/de/staropensource/sosengine/graphics/GraphicsSubsystem.java
index 6c2126c..a32cdf9 100644
--- a/graphics/src/main/java/de/staropensource/sosengine/graphics/GraphicsSubsystem.java
+++ b/graphics/src/main/java/de/staropensource/sosengine/graphics/GraphicsSubsystem.java
@@ -33,7 +33,6 @@ import de.staropensource.sosengine.graphics.events.GraphicsApiShutdownEvent;
 import de.staropensource.sosengine.graphics.events.GraphicsErrorEvent;
 import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 
 import java.util.*;
 
diff --git a/graphics/src/main/java/de/staropensource/sosengine/graphics/events/GraphicsApiErrorEvent.java b/graphics/src/main/java/de/staropensource/sosengine/graphics/events/GraphicsApiErrorEvent.java
new file mode 100644
index 0000000..ea3f75b
--- /dev/null
+++ b/graphics/src/main/java/de/staropensource/sosengine/graphics/events/GraphicsApiErrorEvent.java
@@ -0,0 +1,49 @@
+package de.staropensource.sosengine.graphics.events;
+
+import de.staropensource.sosengine.base.classes.Event;
+import de.staropensource.sosengine.base.events.LogEvent;
+import de.staropensource.sosengine.base.types.LogIssuer;
+import de.staropensource.sosengine.base.types.LogLevel;
+import de.staropensource.sosengine.base.classes.helpers.EventHelper;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/**
+ * Called when a graphics error occurs.
+ *
+ * @since 1-alpha0
+ */
+@SuppressWarnings({ "unused" })
+public class GraphicsApiErrorEvent implements Event {
+    /**
+     * Constructor.
+     */
+    public GraphicsApiErrorEvent() {}
+
+    /**
+     * {@inheritDoc}
+     * @deprecated use the {@code callEvent} method with arguments
+     * @see LogEvent#callEvent(LogLevel, LogIssuer, String)
+     */
+    @Deprecated
+    @Override
+    public void callEvent() {}
+
+    /**
+     * Calls the event and notifies all annotated methods.
+     *
+     * @param error graphics error
+     * @since 1-alpha0
+     */
+    public void callEvent(@NotNull String error) {
+        EventHelper.logCall(getClass());
+
+        for (Method method : EventHelper.getAnnotatedMethods(getClass())) {
+            try {
+                method.invoke(null, error);
+            } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException | NullPointerException | ExceptionInInitializerError ignored) {}
+        }
+    }
+}