diff --git a/src/lib.rs b/src/lib.rs
index 8f7a463..1aacfb4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -19,6 +19,8 @@
 //!
 //! Go to [plugins](plugins) module
 
+#![warn(missing_docs)]
+
 pub mod commands;
 pub mod plugins;
 pub mod tcp;
diff --git a/src/plugins/loader.rs b/src/plugins/loader.rs
index 038da42..28c7aee 100644
--- a/src/plugins/loader.rs
+++ b/src/plugins/loader.rs
@@ -19,6 +19,7 @@ pub trait Plugin: Any + Send + Sync {
     async fn on_plugin_unload(&self);
 }
 
+/// Trait with function to register plugin.
 pub trait PluginRegistrar {
     /// Function to register the plugin
     fn register(&mut self, plugin: Box<dyn Plugin>);
@@ -32,11 +33,12 @@ impl PluginRegistrar for PluginManager {
 
 /// Plugin Manager
 pub struct PluginManager {
+    /// Vector with all loaded plugins.
     pub plugins: Vec<Box<dyn Plugin>>,
 }
 
 impl PluginManager {
-    /// Create empty `PluginManager`
+    /// Create empty `PluginManager`.
     pub fn new() -> Self {
         Self {
             plugins: Vec::new(),
@@ -50,8 +52,10 @@ impl Default for PluginManager {
     }
 }
 
+/// Plugin Manager Type
 pub type PluginManagerType = Arc<PluginManager>;
 
+/// Trait with command functions to implement on struct.
 #[async_trait]
 pub trait Command: Any + Send + Sync {
     /// Command name
@@ -69,11 +73,12 @@ pub trait Command: Any + Send + Sync {
 
 /// Command Manager
 pub struct CommandManager {
+    /// Vector with all commands.
     pub commands: Vec<Box<dyn Command>>,
 }
 
 impl CommandManager {
-    /// Create empty `CommandManager`
+    /// Create empty `CommandManager`.
     pub fn new() -> Self {
         Self {
             commands: Vec::new(),
@@ -87,10 +92,12 @@ impl Default for CommandManager {
     }
 }
 
+/// Command Manager Type
 pub type CommandManagerType = Arc<CommandManager>;
 
+/// Trait with function to register command.
 pub trait CommandRegistrar {
-    /// Function to register the plugin and the commands in the plugin
+    /// Function to register the plugin and the commands in the plugin.
     fn register(&mut self, command: Box<dyn Command>);
 }
 
@@ -100,6 +107,7 @@ impl CommandRegistrar for CommandManager {
     }
 }
 
+/// Trait with event functions to implement on struct.
 #[async_trait]
 pub trait Event: Any + Send + Sync {
     /// Event name (onConnect, onSend)
@@ -110,6 +118,7 @@ pub trait Event: Any + Send + Sync {
 
 /// Event Manager
 pub struct EventManager {
+    /// Vector with all events loaded from plugins.
     pub events: Vec<Box<dyn Event>>,
 }
 
@@ -126,10 +135,13 @@ impl Default for EventManager {
     }
 }
 
+
+/// Event Manager Type
 pub type EventManagerType = Arc<EventManager>;
 
+/// Trait with function to register event.
 pub trait EventRegistrar {
-    /// Function to register the plugin and the commands in the plugin
+    /// Function to register the plugin and the commands in the plugin.
     fn register(&mut self, command: Box<dyn Event>);
 }
 
diff --git a/src/plugins/mod.rs b/src/plugins/mod.rs
index 373fed4..4fa8ee8 100644
--- a/src/plugins/mod.rs
+++ b/src/plugins/mod.rs
@@ -71,7 +71,7 @@
 //!     }
 //! }
 //!
-//! /// Register plugin and command
+//! /// Register plugin and event
 //! #[no_mangle]
 //! pub fn plugin_entry(
 //!     plugin: &mut dyn PluginRegistrar,
diff --git a/src/tcp/client.rs b/src/tcp/client.rs
index 4e4b832..b9ed5e1 100644
--- a/src/tcp/client.rs
+++ b/src/tcp/client.rs
@@ -1,5 +1,6 @@
 #![allow(clippy::unused_io_amount)]
 
+/// Max size of a TCP packet
 pub const MAX_PACKET_LEN: usize = 65536;
 
 use std::{
@@ -7,8 +8,9 @@ use std::{
     net::TcpStream,
 };
 
-/// TCP Client stream
+/// TCP Client
 pub struct Client {
+    /// TCP stream of this client
     pub stream: TcpStream,
 }
 
@@ -18,7 +20,7 @@ impl Client {
         Self { stream }
     }
 
-    /// Read message/buffer from Client
+    /// Read message/buffer from client
     pub fn read(&mut self) -> anyhow::Result<String> {
         // allocate an empty buffer
         let mut buf = [0; MAX_PACKET_LEN];
@@ -26,13 +28,13 @@ impl Client {
         // read buffer from stream
         self.stream.read(&mut buf)?;
 
-        // encode &[u8] to a String and replace null spaces (empty `\0` bytes)
+        // encode &[u8] to a String and delete null bytes (empty `\0` bytes)
         let decoded = String::from_utf8(buf.to_vec())?.replace('\0', "");
 
         Ok(decoded)
     }
 
-    /// Send message to Client
+    /// Send message to client
     pub fn send(&mut self, content: &str) -> io::Result<()> {
         // add a new line at the end of the content
         let content = format!("{content}\n\r");
diff --git a/src/tcp/handle_connection.rs b/src/tcp/handle_connection.rs
index 2af5454..b97240a 100644
--- a/src/tcp/handle_connection.rs
+++ b/src/tcp/handle_connection.rs
@@ -24,8 +24,16 @@ pub async fn handle_connection(
         // run `onSend` events from plugins
         check_event(&mut client, &events, "onSend").await;
 
-        // split message by whitespace
-        let args: &Vec<&str> = &buf.split_ascii_whitespace().collect();
+        // split message by whitespaces
+        let args: Vec<&str> = buf.split_ascii_whitespace().collect();
+
+        // client sent an empty buffer
+        if args.is_empty() {
+            client.send("empty buffer").expect("send message");
+
+            // don't execute the following commands because it causes panic
+            continue
+        }
 
         // get command from args
         let cmd = args[0];