diff --git a/src/Tree.java b/src/Tree.java
index 458a7c7..f8c855a 100644
--- a/src/Tree.java
+++ b/src/Tree.java
@@ -1,2 +1,6 @@
+import java.util.Optional;
+import java.util.ArrayList;
 public class Tree {
+    private Optional<?> root;
+    private ArrayList<Tree> subtrees= new ArrayList<>();
 }