diff --git a/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/CheckCfgUiModule.java b/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/CheckCfgUiModule.java
index 6df8cb665..b3721f481 100644
--- a/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/CheckCfgUiModule.java
+++ b/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/CheckCfgUiModule.java
@@ -15,12 +15,15 @@
 import org.eclipse.xtext.ui.editor.IXtextEditorCallback;
 import org.eclipse.xtext.ui.editor.contentassist.ITemplateProposalProvider;
 import org.eclipse.xtext.ui.editor.templates.CrossReferenceTemplateVariableResolver;
+import org.eclipse.xtext.ui.editor.templates.XtextTemplateContextType;
 import org.eclipse.xtext.xbase.compiler.GeneratorConfigProvider;
 import org.eclipse.xtext.xbase.compiler.IGeneratorConfigProvider;
 
+import com.avaloq.tools.ddk.checkcfg.ui.templates.CheckCfgTemplateContextType;
 import com.avaloq.tools.ddk.checkcfg.ui.templates.CheckCfgTemplateProposalProvider;
 import com.avaloq.tools.ddk.xtext.ui.editor.FixedDirtyStateEditorSupport;
 import com.avaloq.tools.ddk.xtext.ui.templates.KeywordAwareCrossReferenceTemplateVariableResolver;
+import com.avaloq.tools.ddk.xtext.ui.templates.SimpleEnumTemplateVariableResolver;
 
 
 /**
@@ -31,6 +34,15 @@ public CheckCfgUiModule(final AbstractUIPlugin plugin) {
     super(plugin);
   }
 
+  /**
+   * Binds a {@link XtextTemplateContextType} which adds {@link SimpleEnumTemplateVariableResolver}.
+   *
+   * @return {@link CheckCfgTemplateContextType}
+   */
+  public Class<? extends XtextTemplateContextType> bindXtextTemplateContextType() {
+    return CheckCfgTemplateContextType.class;
+  }
+
   /** Binds a proposal provider for check configuration templates. {@inheritDoc} */
   @Override
   public Class<? extends ITemplateProposalProvider> bindITemplateProposalProvider() {
diff --git a/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/templates/CheckCfgTemplateContextType.java b/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/templates/CheckCfgTemplateContextType.java
new file mode 100644
index 000000000..4663e2203
--- /dev/null
+++ b/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/templates/CheckCfgTemplateContextType.java
@@ -0,0 +1,29 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Avaloq Evolution AG and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Avaloq Evolution AG - initial API and implementation
+ *******************************************************************************/
+package com.avaloq.tools.ddk.checkcfg.ui.templates;
+
+import org.eclipse.xtext.ui.editor.templates.XtextTemplateContextType;
+
+import com.avaloq.tools.ddk.xtext.ui.templates.SimpleEnumTemplateVariableResolver;
+
+
+/**
+ * Used for adding custom template variable resolvers.
+ */
+public class CheckCfgTemplateContextType extends XtextTemplateContextType {
+
+  @Override
+  protected void addDefaultTemplateVariables() {
+    super.addDefaultTemplateVariables();
+    addResolver(new SimpleEnumTemplateVariableResolver());
+  }
+
+}
diff --git a/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/templates/CheckCfgTemplateProposalProvider.java b/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/templates/CheckCfgTemplateProposalProvider.java
index fbac863b5..7ae894586 100644
--- a/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/templates/CheckCfgTemplateProposalProvider.java
+++ b/com.avaloq.tools.ddk.checkcfg.ui/src/com/avaloq/tools/ddk/checkcfg/ui/templates/CheckCfgTemplateProposalProvider.java
@@ -12,6 +12,8 @@
 
 import java.util.List;
 import java.util.NoSuchElementException;
+import java.util.Objects;
+import java.util.StringJoiner;
 
 import org.eclipse.emf.ecore.util.EcoreUtil;
 import org.eclipse.jface.text.templates.ContextTypeRegistry;
@@ -22,6 +24,7 @@
 import org.eclipse.jface.text.templates.persistence.TemplateStore;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.xtext.EcoreUtil2;
+import org.eclipse.xtext.common.types.JvmType;
 import org.eclipse.xtext.conversion.impl.QualifiedNameValueConverter;
 import org.eclipse.xtext.resource.IEObjectDescription;
 import org.eclipse.xtext.scoping.IScopeProvider;
@@ -31,6 +34,7 @@
 import org.eclipse.xtext.ui.editor.templates.DefaultTemplateProposalProvider;
 import org.eclipse.xtext.util.Strings;
 import org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter;
+import org.eclipse.xtext.xbase.jvmmodel.JvmTypeReferenceBuilder;
 
 import com.avaloq.tools.ddk.check.check.Check;
 import com.avaloq.tools.ddk.check.check.CheckCatalog;
@@ -70,6 +74,9 @@ public class CheckCfgTemplateProposalProvider extends DefaultTemplateProposalPro
 
   private final TemplateStore templateStore;
 
+  @Inject
+  private JvmTypeReferenceBuilder.Factory typeRefBuilderFactory;
+
   @Inject
   public CheckCfgTemplateProposalProvider(final TemplateStore templateStore, final ContextTypeRegistry registry, final ContextTypeIdHelper helper) {
     super(templateStore, registry, helper);
@@ -125,8 +132,8 @@ protected void createTemplates(final TemplateContext templateContext, final Cont
    */
   @SuppressWarnings("all")
   private void addCatalogConfigurations(final TemplateContext templateContext, final ContentAssistContext context, final ITemplateAcceptor acceptor) {
-    final String templateName = "Add all registered catalogs";
-    final String templateDescription = "configures all missing catalogs";
+    final String templateName = "Add all registered catalogs"; //$NON-NLS-1$
+    final String templateDescription = "configures all missing catalogs"; //$NON-NLS-1$
 
     final String contextTypeId = templateContext.getContextType().getId();
     if (context.getRootModel() instanceof CheckConfiguration) {
@@ -145,12 +152,12 @@ private void addCatalogConfigurations(final TemplateContext templateContext, fin
           } else if (allElements.indexOf(description) > 0) {
             builder.append(Strings.newLine());
           }
-          builder.append("catalog ").append(qualifiedNameValueConverter.toString(description.getQualifiedName().toString())).append(" {").append(Strings.newLine());
+          builder.append("catalog ").append(qualifiedNameValueConverter.toString(description.getQualifiedName().toString())).append(" {").append(Strings.newLine()); //$NON-NLS-1$ //$NON-NLS-2$
           for (Check check : catalog.getAllChecks()) {
-            builder.append("  default ").append(qualifiedNameValueConverter.toString(check.getName())).append(Strings.newLine());
+            builder.append("  default ").append(qualifiedNameValueConverter.toString(check.getName())).append(Strings.newLine()); //$NON-NLS-1$
           }
           // CHECKSTYLE:OFF
-          builder.append("}");
+          builder.append("}"); //$NON-NLS-1$
           builder.append(Strings.newLine());
           // CHECKSTYLE:ON
         }
@@ -158,7 +165,7 @@ private void addCatalogConfigurations(final TemplateContext templateContext, fin
       }
 
       if (builder.length() > 0) {
-        builder.append("${cursor}");
+        builder.append("${cursor}"); //$NON-NLS-1$
         Template t = new Template(templateName, templateDescription, contextTypeId, builder.toString(), true);
         TemplateProposal tp = createProposal(t, templateContext, context, images.forConfiguredCatalog(), getRelevance(t));
         acceptor.accept(tp);
@@ -216,31 +223,29 @@ public String apply(final ConfiguredCheck from) {
       }
     }), Predicates.notNull());
     final CheckCatalog catalog = configuredCatalog.getCatalog();
+    final JvmType stringType = typeRefBuilderFactory.create(context.getResource().getResourceSet()).typeRef(String.class).getType();
     for (final Check check : catalog.getAllChecks()) {
       // create a template on the fly
       final String checkName = check.getName();
       if (!Iterables.contains(alreadyConfiguredCheckNames, checkName)) {
 
         // check if referenced check has configurable parameters
-        String paramString = ""; //$NON-NLS-1$
-        if (!check.getFormalParameters().isEmpty()) {
-          StringBuilder params = new StringBuilder("("); //$NON-NLS-1$
-          for (final FormalParameter p : check.getFormalParameters()) {
-            final String paramName = p.getName();
-            final String defaultValue = String.valueOf(interpreter.evaluate(p.getRight()).getResult());
-            params.append(paramName).append(" = ").append("${").append(defaultValue).append('}'); //$NON-NLS-1$ //$NON-NLS-2$
-            params.append(", "); //$NON-NLS-1$
-          }
-          if (params.length() > 2) {
-            paramString = params.substring(0, params.length() - 2) + ')';
-          }
+        final StringJoiner paramsJoiner = new StringJoiner(", ", " ( ", ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
+        paramsJoiner.setEmptyValue(""); //$NON-NLS-1$
+        for (final FormalParameter param : check.getFormalParameters()) {
+          final JvmType paramType = param.getType().getType();
+          final String paramName = param.getName();
+          final String defaultValue = String.valueOf(interpreter.evaluate(param.getRight()).getResult());
+
+          // Use SimpleEnumTemplateVariableResolver with strings because otherwise TemplateTranslator can't cope with whitespace
+          paramsJoiner.add(paramName + " = " + (Objects.equals(stringType, paramType) ? "\"${defaultValue:SimpleEnum('" + defaultValue + "')}\"" //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
+              : "${" + defaultValue + '}')); //$NON-NLS-1$
         }
 
         final String severity = (catalog.isFinal() || check.isFinal()) ? "default " : "${default:Enum('SeverityKind')} "; //$NON-NLS-1$ //$NON-NLS-2$
         final String description = "Configures the check \"" + check.getLabel() + "\""; //$NON-NLS-1$ //$NON-NLS-2$
         final String contextTypeId = "com.avaloq.tools.ddk.checkcfg.CheckCfg.ConfiguredCheck." + checkName; //$NON-NLS-1$
-        final String pattern = severity + qualifiedNameValueConverter.toString(checkName)
-            + (paramString.length() == 0 ? "${cursor}" : " " + paramString + "${cursor}"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
+        final String pattern = severity + qualifiedNameValueConverter.toString(checkName) + paramsJoiner + "${cursor}"; //$NON-NLS-1$
 
         Template t = new Template(checkName, description, contextTypeId, pattern, true);
         TemplateProposal tp = createProposal(t, templateContext, context, images.forConfiguredCheck(check.getDefaultSeverity()), getRelevance(t));
diff --git a/com.avaloq.tools.ddk.xtext.ui/src/com/avaloq/tools/ddk/xtext/ui/templates/SimpleEnumTemplateVariableResolver.java b/com.avaloq.tools.ddk.xtext.ui/src/com/avaloq/tools/ddk/xtext/ui/templates/SimpleEnumTemplateVariableResolver.java
new file mode 100644
index 000000000..7b36ae9aa
--- /dev/null
+++ b/com.avaloq.tools.ddk.xtext.ui/src/com/avaloq/tools/ddk/xtext/ui/templates/SimpleEnumTemplateVariableResolver.java
@@ -0,0 +1,25 @@
+package com.avaloq.tools.ddk.xtext.ui.templates;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.eclipse.jface.text.templates.TemplateVariable;
+import org.eclipse.xtext.ui.editor.templates.AbstractTemplateVariableResolver;
+import org.eclipse.xtext.ui.editor.templates.XtextTemplateContext;
+
+
+/**
+ * Simple enumeration template where enumeration is passed as string arguments to the template.
+ */
+public class SimpleEnumTemplateVariableResolver extends AbstractTemplateVariableResolver {
+
+  public SimpleEnumTemplateVariableResolver() {
+    super("SimpleEnum", ""); //$NON-NLS-1$ //$NON-NLS-2$
+  }
+
+  @Override
+  public List<String> resolveValues(final TemplateVariable variable, final XtextTemplateContext castedContext) {
+    return variable.getVariableType().getParams().stream().filter(param -> param instanceof String).collect(Collectors.toList());
+  }
+
+}