diff --git a/src/main/java/org/ultramine/core/util/Undoable.java b/src/main/java/org/ultramine/core/util/Undoable.java
new file mode 100644
index 0000000..4be3a9f
--- /dev/null
+++ b/src/main/java/org/ultramine/core/util/Undoable.java
@@ -0,0 +1,42 @@
+package org.ultramine.core.util;
+
+import com.google.common.base.Throwables;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+public interface Undoable
+{
+	void undo();
+
+	static Undoable ofAll(Undoable... undoables)
+	{
+		undoables.getClass(); // NPE
+		return ofAll(Arrays.asList(undoables));
+	}
+
+	static Undoable ofAll(Collection<Undoable> undoables)
+	{
+		undoables.getClass(); // NPE
+		return () -> {
+			Throwable toRethrow = null;
+			for(Undoable undoable : undoables)
+			{
+				try
+				{
+					if(undoable != null)
+						undoable.undo();
+				}
+				catch(Throwable t)
+				{
+					if(toRethrow == null)
+						toRethrow = t;
+					else
+						toRethrow.addSuppressed(t);
+				}
+			}
+			if(toRethrow != null)
+				Throwables.propagate(toRethrow);
+		};
+	}
+}
diff --git a/src/main/java/org/ultramine/core/util/UndoableAction.java b/src/main/java/org/ultramine/core/util/UndoableAction.java
new file mode 100644
index 0000000..b4eda31
--- /dev/null
+++ b/src/main/java/org/ultramine/core/util/UndoableAction.java
@@ -0,0 +1,52 @@
+package org.ultramine.core.util;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+
+public interface UndoableAction
+{
+	Undoable apply();
+
+	static UndoableAction ofAll(UndoableAction... actions)
+	{
+		actions.getClass(); //NPE
+		return ofAll(Arrays.asList(actions));
+	}
+
+	static UndoableAction ofAll(Collection<UndoableAction> actions)
+	{
+		actions.getClass(); //NPE
+		for(UndoableAction action : actions)
+			action.getClass(); // NPE
+		return () -> {
+			for(UndoableAction action : actions)
+				action.getClass(); // NPE (again, collection may be mutable)
+			List<Undoable> undoables = new ArrayList<>(actions.size());
+			for(UndoableAction action : actions)
+			{
+				try
+				{
+					undoables.add(action.apply());
+				}
+				catch(Throwable t)
+				{
+					try
+					{
+						Undoable.ofAll(undoables).undo();
+					}
+					catch(Throwable t1)
+					{
+						t.addSuppressed(t1);
+						throw t;
+					}
+
+					throw t;
+				}
+			}
+
+			return Undoable.ofAll(undoables);
+		};
+	}
+}
diff --git a/src/main/java/org/ultramine/core/util/UndoableValue.java b/src/main/java/org/ultramine/core/util/UndoableValue.java
new file mode 100644
index 0000000..5147dca
--- /dev/null
+++ b/src/main/java/org/ultramine/core/util/UndoableValue.java
@@ -0,0 +1,24 @@
+package org.ultramine.core.util;
+
+public interface UndoableValue<T> extends Undoable
+{
+	T getValue();
+
+	static <T> UndoableValue<T> of(T value, Undoable undoable)
+	{
+		return new UndoableValue<T>()
+		{
+			@Override
+			public T getValue()
+			{
+				return value;
+			}
+
+			@Override
+			public void undo()
+			{
+				undoable.undo();
+			}
+		};
+	}
+}