--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/fj/F3.java	Fri Mar 20 21:04:03 2015 +0900
@@ -0,0 +1,19 @@
+package fj;
+
+/**
+ * A transformation function of arity-3 from <code>A</code>, <code>B</code> and <code>C</code> to
+ * <code>D</code>. This type can be represented using the Java 7 closure syntax.
+ *
+ * @version %build.number%
+ */
+public interface F3<A, B, C, D> {
+  /**
+   * Transform <code>A</code>, <code>B</code> and <code>C</code> to <code>D</code>.
+   *
+   * @param a The <code>A</code> to transform.
+   * @param b The <code>B</code> to transform.
+   * @param c The <code>C</code> to transform.
+   * @return The result of the transformation.
+   */
+  public D f(A a, B b, C c);
+}