Fixable errors

core/src/main/java/org/solovyev/android/calculator/CalculatorFixableError.java

@@ -13,7 +13,7 @@ import java.util.List;
  * Date: 11/17/12
  * Time: 7:30 PM
  */
-public enum CalculatorFixableError {
+public enum CalculatorFixableError implements FixableError {
 
     must_be_rad(Messages.msg_23, Messages.msg_24, Messages.msg_25) {
         @Override
@@ -53,5 +53,4 @@ public enum CalculatorFixableError {
         return null;
     }
 
-    public abstract void fix();
 }

core/src/main/java/org/solovyev/android/calculator/FixableError.java

@@ -0,0 +1,13 @@
+package org.solovyev.android.calculator;
+
+import java.io.Serializable;
+
+/**
+ * User: serso
+ * Date: 12/2/12
+ * Time: 10:21 PM
+ */
+public interface FixableError extends Serializable {
+
+    void fix();
+}