diff --git a/src/main/java/temppackage/Transaction.java b/src/main/java/temppackage/Transaction.java
index ae4a355..6a000ec 100644
--- a/src/main/java/temppackage/Transaction.java
+++ b/src/main/java/temppackage/Transaction.java
@@ -7,13 +7,13 @@ public abstract class Transaction {
   private Share share;
   private int week;
   private TransactionCalculator transactionCalculator;
-  private boolean commited;
+  private boolean committed;
 
   protected Transaction(Share share, int week, TransactionCalculator transactionCalculator) {
     this.share = share;
     this.week = week;
     this.transactionCalculator = transactionCalculator;
-    this.commited = commited;
+    this.committed = false;
   }
 
   public Share getShare() {
@@ -29,11 +29,12 @@ public TransactionCalculator getCalculator() {
   }
 
   public boolean isCommitted() {
-    return this.commited;
+    return this.committed;
   }
 
-  public void commit(Player player) {
-    // TODO
-    this.commited = true;
+  protected void setCommitted(boolean committed) {
+    this.committed = committed;
   }
+
+  public abstract void commit(Player player);
 }