diff --git a/assembly/pom.xml b/assembly/pom.xml
index ab82935..e8c323f 100644
--- a/assembly/pom.xml
+++ b/assembly/pom.xml
@@ -10,7 +10,6 @@
         <version>1.0-SNAPSHOT</version>
     </parent>
 
-    <groupId>nu.zoom.dsl</groupId>
     <artifactId>assembly</artifactId>
 
     <dependencies>
diff --git a/parser/pom.xml b/parser/pom.xml
index a5d8510..e533c1a 100644
--- a/parser/pom.xml
+++ b/parser/pom.xml
@@ -10,8 +10,8 @@
         <version>1.0-SNAPSHOT</version>
     </parent>
 
-    <groupId>nu.zoom.dsl</groupId>
     <artifactId>parser</artifactId>
+
     <dependencies>
         <dependency>
             <groupId>org.antlr</groupId>
diff --git a/parser/src/main/java/nu/zoom/dsl/ast/EndpointNode.java b/parser/src/main/java/nu/zoom/dsl/ast/EndpointNode.java
index c4c771d..cb0fd6f 100644
--- a/parser/src/main/java/nu/zoom/dsl/ast/EndpointNode.java
+++ b/parser/src/main/java/nu/zoom/dsl/ast/EndpointNode.java
@@ -1,7 +1,5 @@
 package nu.zoom.dsl.ast;
 
-import java.util.Optional;
-
 public record EndpointNode(
 	PathsNode paths,
 	String inputType) {
diff --git a/parser/src/main/java/nu/zoom/dsl/ast/EndpointsVisitorTransformer.java b/parser/src/main/java/nu/zoom/dsl/ast/EndpointsVisitorTransformer.java
index a70e385..d175077 100644
--- a/parser/src/main/java/nu/zoom/dsl/ast/EndpointsVisitorTransformer.java
+++ b/parser/src/main/java/nu/zoom/dsl/ast/EndpointsVisitorTransformer.java
@@ -8,80 +8,81 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class EndpointsVisitorTransformer extends EndpointsBaseVisitor<EndpointsParser.DocumentContext> {
-	private ArrayList<EndpointNode> endpoints = new ArrayList<>();
-	private ArrayList<ConfigItemNode> config = new ArrayList<>();
-	private ArrayList<CompoundTypeNode> dataTypes = new ArrayList<>();
-	public EndpointsVisitorTransformer() {
-	}
+    private final ArrayList<EndpointNode> endpoints = new ArrayList<>();
+    private final ArrayList<ConfigItemNode> config = new ArrayList<>();
+    private final ArrayList<CompoundTypeNode> dataTypes = new ArrayList<>();
 
-	public List<EndpointNode> getEndpoints() {
-		return List.copyOf(endpoints);
-	}
+    public EndpointsVisitorTransformer() {
+    }
 
-	public List<ConfigItemNode> getConfig() {
-		return List.copyOf(config);
-	}
+    public List<EndpointNode> getEndpoints() {
+        return List.copyOf(endpoints);
+    }
 
-	public List<CompoundTypeNode> getDataTypes() {
-		return List.copyOf(dataTypes);
-	}
+    public List<ConfigItemNode> getConfig() {
+        return List.copyOf(config);
+    }
 
-	@Override
-	public EndpointsParser.DocumentContext visitConfigitem(EndpointsParser.ConfigitemContext ctx) {
-		String configKey = ctx.configkey().IDENTIFIER().getText() ;
-		String configValue = getText(ctx.configvalue().IDENTIFIER(), ctx.configvalue().VALUE()) ;
-		this.config.add(new ConfigItemNode(configKey, configValue));
-		return super.visitConfigitem(ctx) ;
-	}
+    public List<CompoundTypeNode> getDataTypes() {
+        return List.copyOf(dataTypes);
+    }
 
-	@Override
-	public EndpointsParser.DocumentContext visitCompoundType(EndpointsParser.CompoundTypeContext ctx) {
-		this.dataTypes.add(extractCompoundTypeNode(ctx));
-		return super.visitCompoundType(ctx);
-	}
+    @Override
+    public EndpointsParser.DocumentContext visitConfigitem(EndpointsParser.ConfigitemContext ctx) {
+        String configKey = ctx.configkey().IDENTIFIER().getText();
+        String configValue = getText(ctx.configvalue().IDENTIFIER(), ctx.configvalue().VALUE());
+        this.config.add(new ConfigItemNode(configKey, configValue));
+        return super.visitConfigitem(ctx);
+    }
 
-	@Override
-	public EndpointsParser.DocumentContext visitEndpoint(EndpointsParser.EndpointContext ctx) {
-		List<String> segments = ctx
-				.path()
-				.pathSegment()
-				.stream()
-				.map(
-						segment -> getText(segment.IDENTIFIER(), segment.VALUE())
-				).toList() ;
-		TerminalNode typeReference = ctx.IDENTIFIER() ;
-		if (typeReference != null) {
-			var endpoint = new EndpointNode(new PathsNode(segments), typeReference.getText());
-			this.endpoints.add(endpoint);
-		} else {
-			var compoundTypeNode = extractCompoundTypeNode(ctx.compoundType()) ;
-			var endpoint = new EndpointNode(new PathsNode(segments), compoundTypeNode.name());
-			this.dataTypes.add(compoundTypeNode);
-			this.endpoints.add(endpoint);
-		}
-		return super.visitEndpoint(ctx);
-	}
+    @Override
+    public EndpointsParser.DocumentContext visitCompoundType(EndpointsParser.CompoundTypeContext ctx) {
+        this.dataTypes.add(extractCompoundTypeNode(ctx));
+        return super.visitCompoundType(ctx);
+    }
 
-	private CompoundTypeNode extractCompoundTypeNode(EndpointsParser.CompoundTypeContext ctx) {
-		String typeName = ctx.compoundTypeName().getText() ;
-		List<FieldNode> fields = extractTypeFields(ctx.compoundFields().compoundField()) ;
-		return new CompoundTypeNode(typeName, fields) ;
-	}
+    @Override
+    public EndpointsParser.DocumentContext visitEndpoint(EndpointsParser.EndpointContext ctx) {
+        List<String> segments = ctx
+                .path()
+                .pathSegment()
+                .stream()
+                .map(
+                        segment -> getText(segment.IDENTIFIER(), segment.VALUE())
+                ).toList();
+        TerminalNode typeReference = ctx.IDENTIFIER();
+        if (typeReference != null) {
+            var endpoint = new EndpointNode(new PathsNode(segments), typeReference.getText());
+            this.endpoints.add(endpoint);
+        } else {
+            var compoundTypeNode = extractCompoundTypeNode(ctx.compoundType());
+            var endpoint = new EndpointNode(new PathsNode(segments), compoundTypeNode.name());
+            this.dataTypes.add(compoundTypeNode);
+            this.endpoints.add(endpoint);
+        }
+        return super.visitEndpoint(ctx);
+    }
 
-	private List<FieldNode> extractTypeFields(List<EndpointsParser.CompoundFieldContext> compoundFieldContexts) {
-		return compoundFieldContexts.stream().map(
-				ctx -> new FieldNode(
-						ctx.fieldName().getText(),
-						ctx.fieldType().getText()
-				)
-		).toList() ;
-	}
+    private CompoundTypeNode extractCompoundTypeNode(EndpointsParser.CompoundTypeContext ctx) {
+        String typeName = ctx.compoundTypeName().getText();
+        List<FieldNode> fields = extractTypeFields(ctx.compoundFields().compoundField());
+        return new CompoundTypeNode(typeName, fields);
+    }
 
-	// Concatenate the text from to terminal nodes. Useful for contexts that are either an identifier or a value,
-	// and you just want the text from whichever is not null.
-	private String getText(TerminalNode identifier, TerminalNode value) {
-		return
-				identifier != null ? identifier.getText() : ""
-				+ value != null ? value.getText() : "" ;
-	}
+    private List<FieldNode> extractTypeFields(List<EndpointsParser.CompoundFieldContext> compoundFieldContexts) {
+        return compoundFieldContexts.stream().map(
+                ctx -> new FieldNode(
+                        ctx.fieldName().getText(),
+                        ctx.fieldType().getText()
+                )
+        ).toList();
+    }
+
+    // Concatenate the text from to terminal nodes. Useful for contexts that are either an identifier or a value,
+    // and you just want the text from whichever is not null.
+    private String getText(TerminalNode identifier, TerminalNode value) {
+        return
+                ((identifier != null) ? identifier.getText() : "") +
+                        ((value != null) ? value.getText() : "");
+    }
 }
diff --git a/parser/src/main/java/nu/zoom/dsl/ast/ParserWrapper.java b/parser/src/main/java/nu/zoom/dsl/ast/ParserWrapper.java
index e0397d7..9ccc8a1 100644
--- a/parser/src/main/java/nu/zoom/dsl/ast/ParserWrapper.java
+++ b/parser/src/main/java/nu/zoom/dsl/ast/ParserWrapper.java
@@ -7,7 +7,6 @@ import org.antlr.v4.runtime.CommonTokenStream;
 
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
 import java.nio.file.Path;
 
 public class ParserWrapper {
diff --git a/parser/src/main/java/nu/zoom/dsl/cli/EndpointsCLI.java b/parser/src/main/java/nu/zoom/dsl/cli/EndpointsCLI.java
index ff4be61..c955684 100644
--- a/parser/src/main/java/nu/zoom/dsl/cli/EndpointsCLI.java
+++ b/parser/src/main/java/nu/zoom/dsl/cli/EndpointsCLI.java
@@ -19,16 +19,20 @@ import java.util.concurrent.Callable;
 	description = "Generate source code from an endpoints specification file."
 )
 public class EndpointsCLI implements Callable<Integer> {
-	@Parameters(index = "0", description = "The source endpoints DSL file.")
+	@SuppressWarnings("unused")
+    @Parameters(index = "0", description = "The source endpoints DSL file.")
 	private Path file;
 
-	@Option(names = {"-t", "--template"}, description = "The template directory. Default is ~/endpoints-templates")
+	@SuppressWarnings("CanBeFinal")
+    @Option(names = {"-t", "--template"}, description = "The template directory. Default is ~/endpoints-templates")
 	private Path templateDir = Paths.get(System.getProperty("user.dir"), "endpoints-templates");
 
-	@Option(names = {"-o", "--output"}, description = "The directory to write the generated code to. Default is ~/endpoints-output")
+	@SuppressWarnings("CanBeFinal")
+    @Option(names = {"-o", "--output"}, description = "The directory to write the generated code to. Default is ~/endpoints-output")
 	private Path outputDir = Paths.get(System.getProperty("user.dir"), "endpoints-output");
 
-	@Option(names = {"-v", "--verbose"}, description = "Print verbose debug messages.")
+	@SuppressWarnings("unused")
+    @Option(names = {"-v", "--verbose"}, description = "Print verbose debug messages.")
 	private Boolean verbose = false;
 
 	public static void main(String[] args) {
@@ -60,13 +64,13 @@ public class EndpointsCLI implements Callable<Integer> {
 		}
 	}
 
-	private void validateTemplateDirectory() throws IOException {
+	private void validateTemplateDirectory() {
 		if (!Files.isDirectory(this.templateDir)) {
 			throw new IllegalArgumentException("Template directory '" + this.templateDir + "' is not a directory.");
 		}
 	}
 
-	private void validateInputFile() throws IOException {
+	private void validateInputFile() {
 		if (Files.notExists(this.file)) {
 			throw new IllegalArgumentException("Input file '" + this.file + "' does not exist.");
 		}