fix: make Java.UnreachableStatementError work

error_templates/java/test_files/unreachable_statement_error/test.txt

@@ -9,13 +9,21 @@ template: "Java.UnreachableStatementError"
 ---
 # UnreachableStatementError
 This error occurs because there's code after a return statement, which can never be reached as the function has already exited.
-
+```
+        return;
+        System.out.println("c");
+        ^^^^^^^^^^^^^^^^^^^^^^^^
+    }
+}
+```
 ## Steps to fix
-1. Remove the code after the `return` statement.
-
+### Remove unreachable code
+Since the `return` statement is encountered before `System.out.println("c");`, the latter statement is unreachable. Remove the unreachable statement/s.
 ```diff
-    System.out.println("b");
-    return;
--   System.out.println("c");
+    public static void main(String[] args) {
+        System.out.println("b");
+        return;
+-         System.out.println("c");
+    }
 }
 ```

error_templates/java/unreachable_statement_error.go

@@ -1,16 +1,35 @@
 package java
 
-import lib "github.com/nedpals/errgoengine"
+import (
+	lib "github.com/nedpals/errgoengine"
+)
 
 var UnreachableStatementError = lib.ErrorTemplate{
 	Name:              "UnreachableStatementError",
 	Pattern:           comptimeErrorPattern("unreachable statement"),
 	StackTracePattern: comptimeStackTracePattern,
+	OnAnalyzeErrorFn: func(cd *lib.ContextData, m *lib.MainError) {
+
+	},
 	OnGenExplainFn: func(cd *lib.ContextData, gen *lib.ExplainGenerator) {
-		// TODO: identify return
-		gen.Add("You have code below after you returned a value")
+		gen.Add("This error occurs because there's code after a return statement, which can never be reached as the function has already exited.")
 	},
 	OnGenBugFixFn: func(cd *lib.ContextData, gen *lib.BugFixGenerator) {
-		// TODO:
+		gen.Add("Remove unreachable code", func(s *lib.BugFixSuggestion) {
+			startPos := cd.MainError.Nearest.StartPosition()
+			endPos := cd.MainError.Nearest.Parent().LastNamedChild().EndPosition()
+
+			// Adjust the start position to the beginning of the line
+			startPos = startPos.Add(lib.Position{Column: -startPos.Column})
+
+			s.AddStep(
+				"Since the `return` statement is encountered before `%s`, the latter statement is unreachable. Remove the unreachable statement/s.",
+				cd.MainError.Nearest.Text(),
+			).AddFix(lib.FixSuggestion{
+				NewText:       "",
+				StartPosition: startPos,
+				EndPosition:   endPos,
+			})
+		})
 	},
 }