Add ControlUtil.

src/main/scala/util/ControlUtil.scala

@@ -0,0 +1,37 @@
+package util
+
+import org.eclipse.jgit.api.Git
+
+/**
+ * Provides control facilities.
+ */
+object ControlUtil {
+
+  def defining[A, B](value: A)(f: A => B): B = f(value)
+
+  def using[A <% { def close(): Unit }, B](resource: A)(f: A => B): B =
+    try {
+      f(resource)
+    } finally {
+      if(resource != null){
+        try {
+          resource.close()
+        } catch {
+          case e: Throwable => // ignore
+        }
+      }
+    }
+
+  /**
+   * Use this method to use the Git object.
+   * Repository resources are released certainly after processing.
+   */
+  def using[T](git: Git)(f: Git => T): T =
+    try {
+      f(git)
+    } finally {
+      git.getRepository.close
+    }
+
+
+}