JDBC-618 Mark package org.firebirdsql.jaybird.xca as internal API

src/main/org/firebirdsql/jaybird/xca/package-info.java

@@ -0,0 +1,30 @@
+/*
+ * Firebird Open Source JavaEE Connector - JDBC Driver
+ *
+ * Distributable under LGPL license.
+ * You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * LGPL License for more details.
+ *
+ * This file was created by members of the firebird development team.
+ * All individual contributions remain the Copyright (C) of those
+ * individuals.  Contributors to this file are either listed here or
+ * can be obtained from a source control history command.
+ *
+ * All rights reserved.
+ */
+
+/**
+ * XCA (or ex-connector-architecture), is an internal API of Jaybird for connection management.
+ * <p>
+ * Historically it was derived from the JavaEE Connector Architecture specification, but that tie has been cut
+ * since Jaybird 5.
+ * </p>
+ */
+@InternalApi
+package org.firebirdsql.jaybird.xca;
+
+import org.firebirdsql.util.InternalApi;