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diff --git a/priv/templates/otp_fsm.erl b/priv/templates/otp_fsm.erl
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+++ b/priv/templates/otp_fsm.erl
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+%%%-------------------------------------------------------------------
+%% @copyright {{copyright_holder}} ({{copyright_year}})
+%% @author {{author_name}} <{{author_email}}>
+%% @doc {{appid}} {{fsmid}} OTP FSM.
+%% @end
+%%%-------------------------------------------------------------------
+
+-module({{appid}}_{{fsmid}}_fsm).
+
+-behaviour(gen_fsm).
+
+-include("{{appid}}_log.hrl").
+
+%% API
+-export([start_link/0
+        ]).
+
+%% gen_fsm callbacks
+-export([init/1, handle_event/3, handle_sync_event/4, handle_info/3,
+         terminate/3, code_change/4]).
+
+-export([disconnected/2
+        ,disconnected/3
+        ]).
+
+-record(state, {replaceme}).
+
+%%====================================================================
+%% API
+%%====================================================================
+start_link() ->
+    gen_fsm:start_link(?MODULE, [], []).
+
+%%====================================================================
+%% gen_fsm callbacks
+%%====================================================================
+
+%% gen_fsm init/1 callback
+%% @private
+init([]) ->
+    {ok, disconnected, #state{}}.
+
+%% state event handler functions.
+%% @private
+disconnected(Event, State) ->
+    ?WARN("[state: disconnected] Unhandled event: ~p", [Event]),
+    {next_state, disconnected, State}.
+
+disconnected(Event, _From, State) ->
+    ?WARN("[state: disconnected] Unhandled event: ~p", [Event]),
+    {next_state, disconnected, State}.
+
+%% gen_fsm callbacks
+%% @private
+handle_event(Event, StateName, State) ->
+    ?WARN("[state: ~p] Unhandled event: ~p", [StateName, Event]),
+    {next_state, StateName, State}.
+
+%% @private
+handle_sync_event(Event, _From, StateName, State) ->
+    ?WARN("[state: ~p] Unhandled event: ~p", [StateName, Event]),
+    {next_state, StateName, State}.
+
+%% @private
+handle_info(Info, StateName, State) ->
+    ?INFO("[state: ~p] Unexpected msg: ~p", [StateName, Info]),
+    {next_state, StateName, State}.
+
+%% @private
+terminate(_Reason, _StateName, _State) ->
+    ok.
+
+%% @private
+code_change(_OldVsn, StateName, State, _Extra) ->
+    {ok, StateName, State}.
+
+%%====================================================================
+%% Internal functions
+%%====================================================================