Rewrite our build as modular maven components

This refactoring splits the code up into different components, with
their own per-component CLASSPATH.  By moving all of our classes
into isolated components we can better isolate the classpaths and
try to avoid unexpected dependency problems.  It also allows us to
more clearly define which components are used by the GWT UI and
thus must be compiled under GWT, and which components are run on
the server and can therefore use more of the J2SE API.

Change-Id: I833cc22bacc5655d1c9099ed7c2b0e0a5b08855a
Signed-off-by: Shawn O. Pearce <sop@google.com>

gerrit-common/src/main/java/com/google/gerrit/common/data/SshHostKey.java

@@ -0,0 +1,46 @@
+// Copyright (C) 2009 The Android Open Source Project
+//
+// 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.
+
+package com.google.gerrit.common.data;
+
+/** Description of the SSH daemon host key used by Gerrit. */
+public class SshHostKey {
+  protected String hostIdent;
+  protected String hostKey;
+  protected String fingerprint;
+
+  protected SshHostKey() {
+  }
+
+  public SshHostKey(final String hi, final String hk, final String fp) {
+    hostIdent = hi;
+    hostKey = hk;
+    fingerprint = fp;
+  }
+
+  /** @return host name string, to appear in a known_hosts file. */
+  public String getHostIdent() {
+    return hostIdent;
+  }
+
+  /** @return base 64 encoded host key string, starting with key type. */
+  public String getHostKey() {
+    return hostKey;
+  }
+
+  /** @return the key fingerprint, as displayed by a connecting client. */
+  public String getFingerprint() {
+    return fingerprint;
+  }
+}