Splitting RCON in Input and Output.

While output only returns if command was successful
Input will return RCON return message. (There is not often one. But e.g. while using /list in minecraft RCON). Input will return null will it was unsuccessful

src/main/java/org/codeoverflow/chatoverflow/api/io/input/RconInput.java

@@ -0,0 +1,5 @@
+package org.codeoverflow.chatoverflow.api.io.input;
+
+public interface RconInput extends Input {
+    String getCommandOutput(String command);
+}

src/main/java/org/codeoverflow/chatoverflow/api/io/output/RconOutput.java

@@ -2,5 +2,5 @@
 
 public interface RconOutput extends Output {
 
-    String sendCommand(String command);
+    boolean sendCommand(String command);
 }

src/main/java/org/codeoverflow/chatoverflow/api/plugin/configuration/Input.java

@@ -1,6 +1,7 @@
 package org.codeoverflow.chatoverflow.api.plugin.configuration;
 
 import org.codeoverflow.chatoverflow.api.io.input.FileInput;
+import org.codeoverflow.chatoverflow.api.io.input.RconInput;
 import org.codeoverflow.chatoverflow.api.io.input.SampleInput;
 import org.codeoverflow.chatoverflow.api.io.input.SerialInput;
 import org.codeoverflow.chatoverflow.api.io.input.chat.DiscordChatInput;
@@ -101,6 +102,18 @@ public Requirement<FileInput> file(String uniqueRequirementId, String displayNam
         return requirements.requireInput(uniqueRequirementId, displayName, isOptional, FileInput.class);
     }
 
+    /**
+     * Requires a connection to a RCON Server
+     *
+     * @param uniqueRequirementId any unique id by which your plugin can identify the requirement
+     * @param displayName Is displayed to the framework user and to tell him what to enter
+     * @param isOptional true if this requirement is optional, false if mandatory
+     * @return the requirement object
+     */
+    public Requirement<RconInput> rcon(String uniqueRequirementId, String displayName, boolean isOptional) {
+        return requirements.requireInput(uniqueRequirementId, displayName, isOptional, RconInput.class);
+    }
+
     // Add more inputs here
 
 }