diff --git a/src/main/java/com/linearpast/minecraftmanager/utils/config/ConfigLoader.java b/src/main/java/com/linearpast/minecraftmanager/utils/config/ConfigLoader.java
index 1a44db5..53261a5 100644
--- a/src/main/java/com/linearpast/minecraftmanager/utils/config/ConfigLoader.java
+++ b/src/main/java/com/linearpast/minecraftmanager/utils/config/ConfigLoader.java
@@ -8,6 +8,7 @@ import org.springframework.core.env.PropertySource;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 
 public class ConfigLoader implements EnvironmentPostProcessor {
 	public static final Map<String, String> config = new HashMap<>();
@@ -20,7 +21,7 @@ public class ConfigLoader implements EnvironmentPostProcessor {
 			).findFirst().orElseThrow();
 			if(source instanceof MapPropertySource mapPropertySource) {
 				for (String key : mapPropertySource.getPropertyNames()) {
-					config.put(key, mapPropertySource.getProperty(key).toString());
+					config.put(key, Objects.requireNonNull(mapPropertySource.getProperty(key)).toString());
 					System.out.println(key + "=" + mapPropertySource.getProperty(key));
 				}
 			}
diff --git a/src/main/java/com/linearpast/minecraftmanager/utils/http/HttpUtils.java b/src/main/java/com/linearpast/minecraftmanager/utils/http/HttpUtils.java
index a235cac..aed165e 100644
--- a/src/main/java/com/linearpast/minecraftmanager/utils/http/HttpUtils.java
+++ b/src/main/java/com/linearpast/minecraftmanager/utils/http/HttpUtils.java
@@ -33,17 +33,6 @@ import java.util.Map;
 
 public class HttpUtils {
 
-    /**
-     * get
-     *
-     * @param host
-     * @param path
-     * @param method
-     * @param headers
-     * @param querys
-     * @return
-     * @throws Exception
-     */
     public static HttpResponse doGet(String host, String path, String method,
                                      Map<String, String> headers,
                                      Map<String, String> querys)
@@ -58,18 +47,6 @@ public class HttpUtils {
         return httpClient.execute(request);
     }
 
-    /**
-     * post form
-     *
-     * @param host
-     * @param path
-     * @param method
-     * @param headers
-     * @param querys
-     * @param bodys
-     * @return
-     * @throws Exception
-     */
     public static HttpResponse doPost(String host, String path, String method,
                                       Map<String, String> headers,
                                       Map<String, String> querys,
@@ -96,18 +73,6 @@ public class HttpUtils {
         return httpClient.execute(request);
     }
 
-    /**
-     * Post String
-     *
-     * @param host
-     * @param path
-     * @param method
-     * @param headers
-     * @param querys
-     * @param body
-     * @return
-     * @throws Exception
-     */
     public static HttpResponse doPost(String host, String path, String method,
                                       Map<String, String> headers,
                                       Map<String, String> querys,
@@ -127,18 +92,6 @@ public class HttpUtils {
         return httpClient.execute(request);
     }
 
-    /**
-     * Post stream
-     *
-     * @param host
-     * @param path
-     * @param method
-     * @param headers
-     * @param querys
-     * @param body
-     * @return
-     * @throws Exception
-     */
     public static HttpResponse doPost(String host, String path, String method,
                                       Map<String, String> headers,
                                       Map<String, String> querys,
@@ -158,17 +111,6 @@ public class HttpUtils {
         return httpClient.execute(request);
     }
 
-    /**
-     * Put String
-     * @param host
-     * @param path
-     * @param method
-     * @param headers
-     * @param querys
-     * @param body
-     * @return
-     * @throws Exception
-     */
     public static HttpResponse doPut(String host, String path, String method,
                                      Map<String, String> headers,
                                      Map<String, String> querys,
@@ -188,17 +130,6 @@ public class HttpUtils {
         return httpClient.execute(request);
     }
 
-    /**
-     * Put stream
-     * @param host
-     * @param path
-     * @param method
-     * @param headers
-     * @param querys
-     * @param body
-     * @return
-     * @throws Exception
-     */
     public static HttpResponse doPut(String host, String path, String method,
                                      Map<String, String> headers,
                                      Map<String, String> querys,
@@ -218,17 +149,6 @@ public class HttpUtils {
         return httpClient.execute(request);
     }
 
-    /**
-     * Delete
-     *
-     * @param host
-     * @param path
-     * @param method
-     * @param headers
-     * @param querys
-     * @return
-     * @throws Exception
-     */
     public static HttpResponse doDelete(String host, String path, String method,
                                         Map<String, String> headers,
                                         Map<String, String> querys)
@@ -252,7 +172,7 @@ public class HttpUtils {
         if (null != querys) {
             StringBuilder sbQuery = new StringBuilder();
             for (Map.Entry<String, String> query : querys.entrySet()) {
-                if (0 < sbQuery.length()) {
+                if (!sbQuery.isEmpty()) {
                     sbQuery.append("&");
                 }
                 if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {
@@ -266,7 +186,7 @@ public class HttpUtils {
                     }
                 }
             }
-            if (0 < sbQuery.length()) {
+            if (!sbQuery.isEmpty()) {
                 sbUrl.append("?").append(sbQuery);
             }
         }
diff --git a/src/main/java/com/linearpast/minecraftmanager/utils/rcon/ConnectTask.java b/src/main/java/com/linearpast/minecraftmanager/utils/rcon/ConnectTask.java
index ddf14d6..de10e33 100644
--- a/src/main/java/com/linearpast/minecraftmanager/utils/rcon/ConnectTask.java
+++ b/src/main/java/com/linearpast/minecraftmanager/utils/rcon/ConnectTask.java
@@ -55,9 +55,8 @@ public class ConnectTask implements Callable<MinecraftClient> {
 		try {
 			log.debug("Pausing for {} ms", this.connectOptions.getTimeBetweenRetries().toMillis());
 			Thread.sleep(this.connectOptions.getTimeBetweenRetries().toMillis());
-		} catch (InterruptedException var2) {
-			InterruptedException e = var2;
-			e.printStackTrace();
+		} catch (InterruptedException e) {
+            e.printStackTrace();
 			Thread.currentThread().interrupt();
 		}
 
diff --git a/src/main/java/com/linearpast/minecraftmanager/utils/rcon/MinecraftRconUtils.java b/src/main/java/com/linearpast/minecraftmanager/utils/rcon/MinecraftRconUtils.java
index b4359aa..3733543 100644
--- a/src/main/java/com/linearpast/minecraftmanager/utils/rcon/MinecraftRconUtils.java
+++ b/src/main/java/com/linearpast/minecraftmanager/utils/rcon/MinecraftRconUtils.java
@@ -12,6 +12,7 @@ import java.util.concurrent.*;
 
 import io.graversen.minecraft.rcon.service.ConnectOptions;
 import io.graversen.minecraft.rcon.service.*;
+import lombok.Setter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -22,7 +23,8 @@ public class MinecraftRconUtils {
 	private final ScheduledExecutorService executorService;
 	private volatile IMinecraftClient minecraftClient;
 	private volatile MinecraftRcon minecraftRcon;
-	private volatile boolean isConnected;
+	@Setter
+    private volatile boolean isConnected;
 	private volatile CountDownLatch connectionLatch;
 
 	public MinecraftRconUtils(RconDetails rconDetails, ConnectOptions connectOptions) {
@@ -108,11 +110,8 @@ public class MinecraftRconUtils {
 		if(this.minecraftClient != null) this.minecraftRcon = new MinecraftRcon(this.minecraftClient);
 		else this.minecraftRcon = null;
 	}
-	public void setConnected(boolean connected) {
-		this.isConnected = connected;
-	}
 
-	private class TestConnect implements Runnable {
+    private class TestConnect implements Runnable {
 		private final RconDetails rconDetails;
 		TestConnect(RconDetails rconDetails) {
 			this.rconDetails = rconDetails;