diff --git a/src/main/java/de/plugh/compositeparse/parsers/BoundedInteger.java b/src/main/java/de/plugh/compositeparse/parsers/BoundedInteger.java
index 9362179..46be9fd 100644
--- a/src/main/java/de/plugh/compositeparse/parsers/BoundedInteger.java
+++ b/src/main/java/de/plugh/compositeparse/parsers/BoundedInteger.java
@@ -74,7 +74,6 @@ public class BoundedInteger implements Parser<Integer> {
      * @param max maximum size of the integer
      * @return the {@link BoundedInteger}
      */
-
     public static BoundedInteger between(int min, int max) {
         return new BoundedInteger(min, max);
     }
diff --git a/src/main/java/de/plugh/compositeparse/parsers/Constant.java b/src/main/java/de/plugh/compositeparse/parsers/Constant.java
index 821a050..affc05a 100644
--- a/src/main/java/de/plugh/compositeparse/parsers/Constant.java
+++ b/src/main/java/de/plugh/compositeparse/parsers/Constant.java
@@ -1,7 +1,6 @@
 package de.plugh.compositeparse.parsers;
 
 import de.plugh.compositeparse.Block;
-import de.plugh.compositeparse.ParseException;
 import de.plugh.compositeparse.Parser;
 
 import java.util.List;
@@ -31,7 +30,7 @@ public class Constant<T> implements Parser<T> {
     }
 
     @Override
-    public T read(Block block) throws ParseException {
+    public T read(Block block) {
         return value;
     }
 
diff --git a/src/main/java/de/plugh/compositeparse/parsers/Decision.java b/src/main/java/de/plugh/compositeparse/parsers/Decision.java
index 65973ad..d715e9a 100644
--- a/src/main/java/de/plugh/compositeparse/parsers/Decision.java
+++ b/src/main/java/de/plugh/compositeparse/parsers/Decision.java
@@ -6,6 +6,7 @@ import de.plugh.compositeparse.ParseException;
 import de.plugh.compositeparse.Parser;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.function.Function;
 
@@ -29,9 +30,7 @@ public class Decision<T> implements Parser<T> {
     @SafeVarargs
     public Decision(Pair<Parser<?>, Parser<T>>... pairs) {
         this.pairs = new ArrayList<>();
-        for (Pair<Parser<?>, Parser<T>> pair : pairs) {
-            this.pairs.add(pair);
-        }
+        Collections.addAll(this.pairs, pairs);
     }
 
     /**
diff --git a/src/main/java/de/plugh/compositeparse/parsers/Literal.java b/src/main/java/de/plugh/compositeparse/parsers/Literal.java
index 25d06ee..df820c8 100644
--- a/src/main/java/de/plugh/compositeparse/parsers/Literal.java
+++ b/src/main/java/de/plugh/compositeparse/parsers/Literal.java
@@ -17,21 +17,6 @@ import java.util.function.Function;
  */
 public class Literal<T> implements Parser<T> {
 
-    /**
-     * A single space {@code " "}
-     */
-    public static final Literal<Void> SPACE = new Literal<>(" ");
-
-    /**
-     * A single comma {@code ","}
-     */
-    public static final Literal<Void> COMMA = new Literal<>(",");
-
-    /**
-     * A single semicolon {@code ";"}
-     */
-    public static final Literal<Void> SEMICOLON = new Literal<>(";");
-
     private final String literal;
     private final T value;
 
diff --git a/src/main/java/de/plugh/compositeparse/parsers/Options.java b/src/main/java/de/plugh/compositeparse/parsers/Options.java
index 306eb21..4b01064 100644
--- a/src/main/java/de/plugh/compositeparse/parsers/Options.java
+++ b/src/main/java/de/plugh/compositeparse/parsers/Options.java
@@ -5,6 +5,7 @@ import de.plugh.compositeparse.ParseException;
 import de.plugh.compositeparse.Parser;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.function.Function;
 
@@ -25,9 +26,7 @@ public class Options<T> implements Parser<T> {
     @SafeVarargs
     public Options(Parser<T>... parsers) {
         this.parsers = new ArrayList<>();
-        for (Parser<T> parser : parsers) {
-            this.parsers.add(parser);
-        }
+        Collections.addAll(this.parsers, parsers);
     }
 
     /**