Create ContextHolder helper class

api/src/main/java/com/bartlomiejpluta/base/api/context/ContextHolder.java

@@ -0,0 +1,19 @@
+package com.bartlomiejpluta.base.api.context;
+
+import lombok.Getter;
+import lombok.NonNull;
+
+public enum ContextHolder {
+   INSTANCE;
+
+   @Getter
+   private Context context;
+
+   public void setContext(@NonNull Context context) {
+      if(this.context != null) {
+         throw new IllegalStateException("Context cannot be reassigned");
+      }
+
+      this.context = context;
+   }
+}