diff --git a/build.gradle b/build.gradle
index 82b07d78..1fd2498b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,6 +19,7 @@ plugins {
    id 'java-library'
    id 'antlr'
    id 'maven-publish'
+   id 'signing'
    // https://plugins.gradle.org/plugin/com.palantir.revapi
    id 'com.palantir.revapi' version '1.7.0'
    // https://plugins.gradle.org/plugin/org.fulib.fulibGradle
@@ -44,56 +45,55 @@ repositories {
    mavenCentral()
 }
 
-nexusPublishing {
-   repositories {
-      sonatype()
-   }
+nexusPublishing.repositories.sonatype()
+
+java {
+   withJavadocJar()
+   withSourcesJar()
 }
 
-publishing {
-   publications {
-      mavenJava(MavenPublication) {
-         from(components.java)
-         pom {
-            name = project.name
-            description = project.description
-            url = 'https://github.com/fujaba/fulib'
-            inceptionYear = '2018'
-
-            scm {
-               url = 'https://github.com/fujaba/fulib'
-            }
-
-            licenses {
-               license {
-                  name = 'MIT License'
-                  url = 'https://www.opensource.org/licenses/mit-license.php'
-               }
-            }
-
-            developers {
-               developer {
-                  id = 'zuendorf'
-                  name = 'Albert Zuendorf'
-               }
-               developer {
-                  id = 'digitalhoax'
-                  name = 'Tobias George'
-               }
-               developer {
-                  id = 'eicke123'
-                  name = 'Christoph Eickhoff'
-               }
-               developer {
-                  id = 'Clashsoft'
-                  name = 'Adrian Kunz'
-               }
-            }
+publishing.publications.create('mavenJava', MavenPublication) {
+   it.from(components.java)
+   it.pom {
+      name = project.name
+      description = project.description
+      url = 'https://github.com/fujaba/fulib'
+      inceptionYear = '2018'
+
+      scm {
+         url = 'https://github.com/fujaba/fulib'
+      }
+
+      licenses {
+         license {
+            name = 'MIT License'
+            url = 'https://www.opensource.org/licenses/mit-license.php'
+         }
+      }
+
+      developers {
+         developer {
+            id = 'zuendorf'
+            name = 'Albert Zuendorf'
+         }
+         developer {
+            id = 'digitalhoax'
+            name = 'Tobias George'
+         }
+         developer {
+            id = 'eicke123'
+            name = 'Christoph Eickhoff'
+         }
+         developer {
+            id = 'Clashsoft'
+            name = 'Adrian Kunz'
          }
       }
    }
 }
 
+signing.sign publishing.publications.mavenJava
+
 dependencies {
    // https://mvnrepository.com/artifact/org.fulib/fulibScenarios
    fulibScenarios group: 'org.fulib', name: 'fulibScenarios', version: '1.7.0'
diff --git a/docs/sdmlib-migration.md b/docs/sdmlib-migration.md
new file mode 100644
index 00000000..4e2a41b0
--- /dev/null
+++ b/docs/sdmlib-migration.md
@@ -0,0 +1,19 @@
+# Migrating from SDMLib
+
+SDMLib syntax can be migrated to fulib decorator syntax with a few regular expressions:
+
+> The examples assume a `ClassModelManager model` parameter.
+
+```regexp
+(\w+).(with|create)Attribute\(
+model.haveAttribute($1, 
+
+(\w+).(with|create)UniDirectional\((\w+), "(\w+)", (ONE|MANY)\)
+model.associate($1, "$3", $4, $2, null, 0)
+
+(\w+).(with|create)Bidirectional\((\w+), "(\w+)", (ONE|MANY), "(\w+)", (ONE|MANY)\)
+model.associate($1, "$3", $4, $2, "$5", $6)
+
+\)\.withSuperClazz\(
+, 
+```
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index e750102e..2e6e5897 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/src/main/java/org/fulib/util/AbstractGenerator4ClassFile.java b/src/main/java/org/fulib/util/AbstractGenerator4ClassFile.java
index 31311252..2cfb24fd 100644
--- a/src/main/java/org/fulib/util/AbstractGenerator4ClassFile.java
+++ b/src/main/java/org/fulib/util/AbstractGenerator4ClassFile.java
@@ -115,16 +115,12 @@ public STGroup getSTGroup(String origFileName)
 
    private STGroup loadSTGroup(String origFileName)
    {
-      STGroup group;
-      try
+      STGroup group = new STGroupFile(origFileName);
+      if (this.customTemplatesFile != null)
       {
-         group = new STGroupFile(this.customTemplatesFile);
-         STGroup origGroup = new STGroupFile(origFileName);
-         group.importTemplates(origGroup);
-      }
-      catch (Exception e)
-      {
-         group = new STGroupFile(origFileName);
+         final STGroup custom = new STGroupFile(this.customTemplatesFile);
+         custom.importTemplates(group);
+         group = custom;
       }
       group.registerRenderer(String.class, new FulibStringRenderer());
       return group;