Code cleanup.

Author: brianburton

src/main/java/org/javimmutable/collections/Func0.java

@@ -40,6 +40,7 @@
  *
  * @param <T>
  */
+@FunctionalInterface
 public interface Func0<T>
 {
     T apply();

src/main/java/org/javimmutable/collections/Func1.java

@@ -40,6 +40,7 @@
 /**
  * Interface for functions that take a single parameter.
  */
+@FunctionalInterface
 public interface Func1<P, R>
     extends Function<P, R>
 {

src/main/java/org/javimmutable/collections/Func2.java

@@ -38,6 +38,7 @@
 /**
  * Interface for functions that take two parameters.
  */
+@FunctionalInterface
 public interface Func2<P1, P2, R>
 {
     R apply(P1 p1,

src/main/java/org/javimmutable/collections/Func3.java

@@ -38,6 +38,7 @@
 /**
  * Interface for functions that take three parameters.
  */
+@FunctionalInterface
 public interface Func3<P1, P2, P3, R>
 {
     R apply(P1 p1,

src/main/java/org/javimmutable/collections/Func4.java

@@ -38,6 +38,7 @@
 /**
  * Interface for functions that take four parameters.
  */
+@FunctionalInterface
 public interface Func4<P1, P2, P3, P4, R>
 {
     R apply(P1 p1,

src/main/java/org/javimmutable/collections/Indexed.java

@@ -37,24 +37,18 @@
 
 /**
  * Interface for containers that allow access to values by an integer index.
- *
- * @param <T>
  */
 public interface Indexed<T>
 {
     /**
      * Retrieve the value.  The index must be valid for the container's current size (i.e. [0-size)
      *
-     * @param index
-     * @return
      * @throws IndexOutOfBoundsException if index is out of bounds
      */
     T get(int index);
 
     /**
      * Retrieve the number of values available in the container.
-     *
-     * @return
      */
     int size();
 }

src/main/java/org/javimmutable/collections/JImmutableArray.java

@@ -67,6 +67,7 @@ public interface JImmutableArray<T>
      * @return value associated with index or null if no value is associated
      */
     @Nullable
+    @Override
     T get(int index);
 
 
@@ -130,6 +131,7 @@ JImmutableArray<T> assign(int index,
     /**
      * Return the number of entries in the map.
      */
+    @Override
     int size();
 
     /**

src/main/java/org/javimmutable/collections/JImmutableList.java

@@ -72,6 +72,7 @@ interface Builder<T>
      *
      * @throws IndexOutOfBoundsException if index is out of bounds
      */
+    @Override
     T get(int index);
 
     /**
@@ -88,6 +89,7 @@ JImmutableList<T> assign(int index,
      * Adds a value to the end of the list.  May be invoked on an empty list.
      */
     @Nonnull
+    @Override
     JImmutableList<T> insert(@Nullable T value);
 
     /**
@@ -144,7 +146,7 @@ JImmutableList<T> assign(int index,
      */
     @Nonnull
     JImmutableList<T> insertAllFirst(@Nonnull Iterable<? extends T> values);
-    
+
     /**
      * Adds the values to the beginning of the list in the same order they appear in the Iterable.  May be invoked on an empty list.
      *
@@ -169,7 +171,7 @@ JImmutableList<T> assign(int index,
      */
     @Nonnull
     JImmutableList<T> insertAllLast(@Nonnull Iterable<? extends T> values);
-    
+
     /**
      * Adds the values to the end of the list in the same order they appear in the Iterable.  May be invoked on an empty list.
      * Synonym for insertAll()

src/main/java/org/javimmutable/collections/JImmutableMap.java

@@ -81,6 +81,7 @@ interface Entry<K, V>
      * @return empty Holder if not found, otherwise filled Holder with value
      */
     @Nonnull
+    @Override
     Holder<V> find(@Nonnull K key);
 
     /**

src/main/java/org/javimmutable/collections/JImmutableMultiset.java

@@ -482,6 +482,7 @@ JImmutableMultiset<T> deleteOccurrence(@Nonnull T value,
      * @return Cursor that behaves as if multiset was a JImmutableSet
      */
     @Nonnull
+    @Override
     Cursor<T> cursor();
 
     /**
@@ -533,11 +534,13 @@ JImmutableMultiset<T> setCount(@Nonnull T value,
     /**
      * @return true only if the multiset contains no values
      */
+    @Override
     boolean isEmpty();
 
     /**
      * @return total number of unique values in the multiset. Same as the number of items in cursor() and entryCursor().
      */
+    @Override
     int size();
 
     /**