diff --git a/core-lib/src/main/java/de/kentoj/scrowlib/instancemanager/InstanceManager.java b/core-lib/src/main/java/de/kentoj/scrowlib/instancemanager/InstanceManager.java
index 613221d..ad67923 100644
--- a/core-lib/src/main/java/de/kentoj/scrowlib/instancemanager/InstanceManager.java
+++ b/core-lib/src/main/java/de/kentoj/scrowlib/instancemanager/InstanceManager.java
@@ -6,18 +6,27 @@ import java.util.List;
 
 public interface InstanceManager {
 
+    /**
+     * Runs blocking.
+     * Deploys an instance of template.
+     */
     ServerInstance deployInstance(String template);
 
     /**
+     * Runs blocking.
      * @return if the instance was found
      */
     boolean destroyInstance(String handle);
 
     /**
-     * @return Flux with handles of running servers
+     * Runs blocking.
+     * @return list of running instances
      */
     List<ServerInstance> getInstances();
 
+    /**
+     * Runs blocking
+     */
     @Nullable
     ServerInstance getInstance(String handle);
 }