fix some get set method

src/main/java/com/ss/jme/plugin/JmePluginState.java

@@ -47,4 +47,7 @@ void copyOf(@Nullable JmePluginState other) {
     public void setJmbPath(@Nullable String jmbPath) {
         this.jmbPath = jmbPath == null ? DEFAULT_JMB_PATH : jmbPath;
     }
+    public String getJmbPath() {
+        return this.jmbPath;
+    }
 }

src/main/java/com/ss/jme/plugin/jmb/JmbInstance.java

@@ -51,6 +51,7 @@ public class JmbInstance extends Thread {
     @NotNull
     private static final ReadablePacketRegistry PACKET_REGISTRY = ReadablePacketRegistry.of(EmptyServerCommand.class);
 
+
     @NotNull
     private static final ExecutorService EXECUTOR_SERVICE = Executors.newSingleThreadExecutor();
 
@@ -156,6 +157,10 @@ public void run() {
         }
     }
 
+    public void setServer(Server server) {
+        this.server = server;
+    }
+
     /**
      * Starts an instance of jMB.
      *
@@ -297,12 +302,25 @@ private synchronized void startInstanceImpl() {
         LOG.debug("jMB was started successfully.");
     }
 
+    private void setLastJmbPath(Path pathToJmb) {
+        lastJmbPath = pathToJmb;
+    }
+
+    private Server getServer() {
+        return server;
+    }
+
+    private Path getLastJmbPath() {
+        return lastJmbPath;
+    }
+
     /**
      * Gets the server of jMB.
      *
      * @return the server of jMB.
      */
-    private @NotNull Optional<Server> getServerOpt() {
+    private @NotNull
+    Optional<Server> getServerOpt() {
         return Optional.ofNullable(server);
     }