Add interface exception class

Add an exception class for interface errors.

Change-Id: I8409e345ff5dd5cf3744b1c2ef9501199bbadfee
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/errors.cpp b/errors.cpp
new file mode 100644
index 0000000..af02d5b
--- /dev/null
+++ b/errors.cpp
@@ -0,0 +1,35 @@
+/**
+ * Copyright © 2017 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <log.hpp>
+#include "errors.hpp"
+
+namespace phosphor
+{
+namespace inventory
+{
+namespace manager
+{
+void InterfaceError::log() const
+{
+    logging::log<logging::level::ERR>(
+        what(),
+        phosphor::logging::entry("INTERFACE=%s", interface));
+}
+} // namespace manager
+} // namespace inventory
+} // namespace phosphor
+
+// vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4