diff --git a/src/.main.rs.swp b/src/.main.rs.swp
deleted file mode 100644
index c52d682..0000000
Binary files a/src/.main.rs.swp and /dev/null differ
diff --git a/src/config.rs b/src/config.rs
index 7bca115..36dc7d1 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -76,7 +76,7 @@ fn build_config_std() -> Config {
          },
          output: Stream {
             engine: Engine{
-               name: String::from("gui"),
+               name: String::from("stdout"),
                kafka: None,
                device: None,
                udp: None,
diff --git a/src/engine.rs b/src/engine.rs
index a854edf..d51e3e8 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -24,7 +24,7 @@ pub fn build_input_engine(cfg: &Engine) -> Box<dyn InputEngine> {
    Box::new(InputEngineStdin{})
 }
 
-struct InputEngineDevice {
+pub struct InputEngineDevice {
 }
 
 pub fn build_input_engine_device(cfg: &Engine) -> Result<InputEngineDevice, String> {
@@ -106,7 +106,7 @@ impl InputEngine for InputEngineDevice {
    }
 }
 
-struct InputEngineUDP {
+pub struct InputEngineUDP {
    last_socket: Option<std::net::UdpSocket>,
    port: i32,
 }
@@ -140,7 +140,7 @@ impl InputEngine for InputEngineUDP {
    }
 }
 
-struct InputEngineKafka {
+pub struct InputEngineKafka {
 }
 
 pub fn build_input_engine_kafka(cfg: &Engine) -> Result<InputEngineKafka, String> {
@@ -154,7 +154,7 @@ impl InputEngine for InputEngineKafka {
    }
 }
 
-struct InputEngineStdin {}
+pub struct InputEngineStdin {}
 
 impl InputEngine for InputEngineStdin {
    fn get(&mut self) -> Vec<char> {
@@ -201,7 +201,7 @@ pub fn build_output_engine(cfg: &Engine) -> Box<dyn OutputEngine> {
    Box::new(OutputEngineStdout{})
 }
 
-struct OutputEngineStdout {}
+pub struct OutputEngineStdout {}
 
 impl OutputEngine for OutputEngineStdout {
    fn put(&mut self, v: Vec<char>) {
@@ -230,7 +230,7 @@ mod test_output {
    }
 }
 
-struct OutputEngineUDP {
+pub struct OutputEngineUDP {
    last_socket: Option<std::net::UdpSocket>,
    host: String,
    port: i32,