diff --git a/maven-plugin-tools-generators/src/main/java/org/apache/maven/tools/plugin/generator/PluginDescriptorGenerator.java b/maven-plugin-tools-generators/src/main/java/org/apache/maven/tools/plugin/generator/PluginDescriptorGenerator.java
index 47578a3..c6985d1 100644
--- a/maven-plugin-tools-generators/src/main/java/org/apache/maven/tools/plugin/generator/PluginDescriptorGenerator.java
+++ b/maven-plugin-tools-generators/src/main/java/org/apache/maven/tools/plugin/generator/PluginDescriptorGenerator.java
@@ -445,7 +445,7 @@ public class PluginDescriptorGenerator
 
                     String roleHint = null;
 
-                    int posRoleHintSeparator = role.indexOf( "#" );
+                    int posRoleHintSeparator = role.indexOf( '#' );
                     if ( posRoleHintSeparator > 0 )
                     {
                         roleHint = role.substring( posRoleHintSeparator + 1 );
diff --git a/maven-plugin-tools-javadoc/src/main/java/org/apache/maven/tools/plugin/javadoc/AbstractMojoTaglet.java b/maven-plugin-tools-javadoc/src/main/java/org/apache/maven/tools/plugin/javadoc/AbstractMojoTaglet.java
index f6759e4..1f6eadc 100644
--- a/maven-plugin-tools-javadoc/src/main/java/org/apache/maven/tools/plugin/javadoc/AbstractMojoTaglet.java
+++ b/maven-plugin-tools-javadoc/src/main/java/org/apache/maven/tools/plugin/javadoc/AbstractMojoTaglet.java
@@ -149,7 +149,7 @@ public abstract class AbstractMojoTaglet
         {
             String nextToken = token.nextToken();
 
-            if ( nextToken.indexOf( "=" ) == -1 )
+            if ( nextToken.indexOf( '=' ) == -1 )
             {
                 // using pattern: @annotation <annotationValue>
                 tagValue = nextToken;
@@ -178,7 +178,7 @@ public abstract class AbstractMojoTaglet
         {
             String nextToken = token.nextToken();
 
-            if ( nextToken.indexOf( "=" ) == -1 )
+            if ( nextToken.indexOf( '=' ) == -1 )
             {
                 // using pattern: @annotation <annotationValue>
                 continue;
@@ -385,7 +385,7 @@ public abstract class AbstractMojoTaglet
      */
     private static List<String> getOnlyValues( String text )
     {
-        if ( text.indexOf( "|" ) == -1 )
+        if ( text.indexOf( '|' ) == -1 )
         {
             return Collections.emptyList();
         }