diff --git a/src/main/java/ua/net/uid/utils/Function.java b/src/main/java/ua/net/uid/utils/Function.java
index 804999c..a3efb5a 100644
--- a/src/main/java/ua/net/uid/utils/Function.java
+++ b/src/main/java/ua/net/uid/utils/Function.java
@@ -18,8 +18,8 @@
 /**
  *
  * @author nightfall
- * @param <T>
- * @param <R>
+ * @param <T> argument type
+ * @param <R> result type
  */
 @FunctionalInterface
 public interface Function<T, R> {
diff --git a/src/main/java/ua/net/uid/utils/Getter.java b/src/main/java/ua/net/uid/utils/Getter.java
index af3d800..0fc1dcc 100644
--- a/src/main/java/ua/net/uid/utils/Getter.java
+++ b/src/main/java/ua/net/uid/utils/Getter.java
@@ -18,8 +18,8 @@
 /**
  *
  * @author nightfall
- * @param <K> argument type
- * @param <V> result type
+ * @param <K> key type
+ * @param <V> value type
  */
 public interface Getter<K, V> {
     V get(K key);
diff --git a/src/main/java/ua/net/uid/utils/Setter.java b/src/main/java/ua/net/uid/utils/Setter.java
index a426d3f..454cec0 100644
--- a/src/main/java/ua/net/uid/utils/Setter.java
+++ b/src/main/java/ua/net/uid/utils/Setter.java
@@ -18,8 +18,8 @@
 /**
  * 
  * @author nightfall
- * @param <K> 
- * @param <V> 
+ * @param <K> key type
+ * @param <V> value type
  */
 public interface Setter<K, V> {
     void set(K name, V value);